Fix compiling with _IRR_COMPILE_WITH_BURNINGSVIDEO_ disabled. Thx @SLC for reporting.

That dreadFun function looks rather suspiciously like some test which doesn't belong into Irrlicht anyway... 


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5096 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CSoftwareDriver2.cpp

@@ -2402,7 +2402,7 @@ core::dimension2du CBurningVideoDriver::getMaxTextureSize() const
 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
 
 
-#ifdef _IRR_WINDOWS_
+#if defined(_IRR_WINDOWS_) && defined(_IRR_COMPILE_WITH_BURNINGSVIDEO_)
 	#include <windows.h>
 
 struct dreadglobal