Add support for 32bit indices under ogl-es. Needs a backup handling in case the extension is missing.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@2385 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COGLESDriver.cpp

@@ -953,7 +953,11 @@ void COGLES1Driver::drawVertexPrimitiveList2d3d(const void* vertices, u32 vertex
 		}
 		case (EIT_32BIT):
 		{
-			// TODO ogl-es
+#ifdef GL_OES_element_index_uint
+			if (FeatureAvailable[IRR_OES_element_index_uint])
+				indexSize=GL_UNSIGNED_INT;
+			else
+#endif
 			indexSize=GL_UNSIGNED_SHORT;
 			break;
 		}