Add default parameter to simplify setting textureBlend.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2460 dfc29bdd-3216-0410-991c-e03cc46cb475

include/SMaterial.h

@@ -83,7 +83,7 @@ namespace video
 	};
 
 	//! EMT_ONETEXTURE_BLEND: pack srcFact & dstFact and Modulo to MaterialTypeParam
-	inline f32 pack_texureBlendFunc ( const E_BLEND_FACTOR srcFact, const E_BLEND_FACTOR dstFact, const E_MODULATE_FUNC modulate )
+	inline f32 pack_texureBlendFunc ( const E_BLEND_FACTOR srcFact, const E_BLEND_FACTOR dstFact, const E_MODULATE_FUNC modulate=EMFN_MODULATE_1X )
 	{
 		return (f32)(modulate << 16 | srcFact << 8 | dstFact);
 	}