Cycles: Fixed memory leak in ColorSpaceManager

Cached OCIO processors were not freed, instead the color spaces were freed twice.

Reviewed By: brecht, sergey

Differential Revision: https://developer.blender.org/D12011

intern/cycles/render/colorspace.cpp

@@ -385,7 +385,7 @@ void ColorSpaceManager::free_memory()
 {
 #ifdef WITH_OCIO
   map_free_memory(cached_colorspaces);
-  map_free_memory(cached_colorspaces);
+  map_free_memory(cached_processors);
 #endif
 }