fixed ~200 warnings for windows

minor build system changes (now cuda code in opencv_core is compiled using CUDA_ARCH* cmake variables)

modules/highgui/src/window_w32.cpp

@@ -560,6 +560,7 @@ double cvGetOpenGlProp_W32(const char* name)
         
     __END__;
 #endif
+	(void)name;
 
     return result;   
 }