Fixing transparency in handle shader

Data/Raw/Editor/Shaders/SolidHandle.bsl

@@ -29,8 +29,7 @@ Technique : inherits("SolidGizmo") =
 		DepthWrite = false;
 		DepthRead = false;
 		Stencil = true;
-		StencilRef = 1;
-		StencilOpBack = { KEEP, KEEP, INC, PASS };
+		StencilOpFront = { KEEP, KEEP, INC, PASS };
 		
 		Target =
 		{

Source/BansheeGLRenderAPI/Source/BsGLBuffer.cpp

@@ -69,7 +69,7 @@ namespace BansheeEngine
 
 			if (buffer == nullptr)
 			{
-				BS_EXCEPT(InternalErrorException, "Cannot map vertex buffer.");
+				BS_EXCEPT(InternalErrorException, "Cannot map OpenGL buffer.");
 			}
 
 			mZeroLocked = false;