Fixes for CMake USE_PREBUILT_SHADERS option

CMakeLists.txt

@@ -179,6 +179,8 @@ if (NOT COMPILED_SHADERS)
     endif()
     set(COMPILED_SHADERS ${CMAKE_CURRENT_BINARY_DIR}/Shaders/Compiled)
     file(MAKE_DIRECTORY ${COMPILED_SHADERS})
+else()
+    file(TO_CMAKE_PATH ${COMPILED_SHADERS} COMPILED_SHADERS)
 endif()
 
 set(LIBRARY_SOURCES ${LIBRARY_SOURCES}