- Fixed MacOSX compilation errors.

This is the missing piece of commit r4107 (I'm sorry for two commits instead of one).

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- Fixed MacOSX compilation errors.

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- Improved parameter names in a files related to a Cg support.

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Last change to xml-reader (returning whitespace as well) was maybe correct, but wrecked too much code expecting old behavior. So now instead there are no EXN_TEXT nodes returned which only contain whitespace, which should also work cross-platform and is closer to the old behavior. We can make that flag public later on, but should probably first fix the mess with getNodeName and getNodeData returning the exact same value.

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Fix for render context change where only the window id is given. We now try to change only the window ID, keeping context and display unchanged. Suggestion by vovo4ka from the forum.

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- XML-reader now preserves all whitespace. So even newlines are now returned as EXN_TEXT nodes. Old behavior was dropping those, but it handled unix-style newlines badly and should rather have preserved all whitespace or none. Preserving no whitespace could be useful feature for the future.
- XML documentation updated where documentation and implementation had been different.
- c::b Linux now compiling engine with -fno-exceptions like the Makefile. Should probably use no-rtti as well, but haven't figured out how to do that without getting warnings for every c-file.
- tests now compiling with -fno-exceptions and defines _IRR_STATIC_LIB_ plus _DEBUG
- new function xmlCompareFiles in testUtils to replace binaryCompareFiles for tests with xml-files as binaries always broke with different wchar_t sizes.
- test ioScene now working on Linux-32


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Updated scene.irr files for the ioScene test. I couldn't figure out why the original .irr files where ever used - even going back to the first version when they were created (r3532) those files never worked. But going through the differing values by hand all attributes with different values from the old test-irr's did write the correct value to xml (aka as it was in memory in the scenenodes) so I use now the resulting .irr file as we currently get it. More changes (Linux) for this test coming later, but ioScene test passes now on Windows.

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I've renamed test line2dIntersect to testLine2d and added new tests there (lazy).
Similar fixes for integers should be done in line3d, but can't do that now, so has to wait.

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Fix CTriangleBBSelector.h which had been broken when CTriangleSelector::getTriangle behaviour had been improved (it's overloaded getTriangle no longer got called). Tests collisionResponseAnimator and sceneCollisionManager do now pass again.


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Fix leaks in several tests. Current test results (WinXP/VS10): 53 passing, 10 failing, 3 don't run through (collisionResponseAnimator, sceneCollisionManager, screenshot).

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- GUIEditor attributes have now scrollbar to be editable
- Remove warning when compiling line2d::intersectWith with other types than f32.
- CodeBlocks tests project file now compiling also on Linux.
- Slightly more lenient comparison in test textureRenderStates


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- line2d::getMiddle and line3d::getMiddle work now also with integers. But can be slower in debug and for compilers which are not optimizing division by 2 to multiplication by 0.5 for floats also in release (if that still matters we need a template specialization here).

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Remove the define which enabled the DDS loader always, without regarding the settings in compile configs

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unpack_texureBlendFunc => unpack_textureBlendFunc in D3D8 (was renamed recently). Thanks at greenya for noticing!

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Merged revisions 4001-4056 from 1.7 branch. Keycode updates, fix compilation errors, vector normalize error case fixed, joystick safety fixes, editbox updates, meshviewer modal window fix, isPointInsideFast changes.

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