1). Fix for cube maps in the player.

ImBuf pointer was being overridden causing the ibuf->rect to be zero.

2). Added vertex attributes for tangents in in vertex arrays.
This, probably needs the extensions enabled (glEnableVertexAttribArrayARB, glDisableVertexAttribArrayARB), but am a little
weary about enabling them right now.

source/gameengine/Ketsji/BL_Texture.cpp

@@ -667,7 +667,7 @@ void my_envmap_split_ima(EnvMap *env, ImBuf *ibuf)
 	}
 	else {
 		for(part=0; part<6; part++) {
-			env->cube[part]= ibuf= IMB_allocImBuf(dx, dx, 24, IB_rect, 0);
+			env->cube[part]= IMB_allocImBuf(dx, dx, 24, IB_rect, 0);
 		}
 		IMB_rectcpy(env->cube[0], ibuf, 
 			0, 0, 0, 0, dx, dx);

source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_VAOpenGLRasterizer.cpp

@@ -332,6 +332,12 @@ void RAS_VAOpenGLRasterizer::TexCoordPtr(const RAS_TexVert *tv, int enabled)
 			}
 		}
 	}
+
+#ifdef GL_ARB_vertex_program
+	if(m_useTang && bgl::RAS_EXT_support._ARB_vertex_program)
+		bgl::blVertexAttrib4fvARB(1/*tangent*/, tv->getTangent());
+#endif
+
 #endif
 }