Cycles: Make OpenCL folks happy to use __KERNEL_DEBUG__

Quite straightforward change, the only annoying thing is that we can't use
indentation for include directive just because of the way headers inlineing
works for OpenCL.

Might do smarter job in path_source_replace_includes() but don't want to
spend time on this yet.

intern/cycles/device/device_opencl.cpp

@@ -102,7 +102,11 @@ static string opencl_kernel_build_options(const string& platform, const string *
 
 	if(opencl_kernel_use_debug())
 		build_options += "-D__KERNEL_OPENCL_DEBUG__ ";
-	
+
+#ifdef WITH_CYCLES_DEBUG
+	build_options += "-D__KERNEL_DEBUG__ ";
+#endif
+
 	return build_options;
 }
 

intern/cycles/kernel/kernel_path.h

@@ -46,7 +46,7 @@
 #include "kernel_path_volume.h"
 
 #ifdef __KERNEL_DEBUG__
-#  include "kernel_debug.h"
+#include "kernel_debug.h"
 #endif
 
 CCL_NAMESPACE_BEGIN