Attempted fix for issue with latest CUDA kernel for 32 bit windows/linux/mac,

there seems to be some sort of compiler bug in CUDA toolkit 4.2, uninlining a
few functions seems to avoid it.

intern/cycles/render/osl.h

@@ -36,7 +36,7 @@ class Device;
 class DeviceScene;
 class ImageManager;
 class OSLRenderServices;
-class OSLGlobals;
+struct OSLGlobals;
 class Scene;
 class ShaderGraph;
 class ShaderNode;