xrRenderPC_GL: Replace '\'->'/' when loading shader includes in non-Windows

Author: Zegeri

src/Layers/xrRenderPC_GL/rgl.cpp

@@ -745,7 +745,11 @@ static inline void load_includes(LPCSTR pSrcData, UINT SrcDataLen, xr_vector<cha
         // Create path to included shader
         strconcat(sizeof path, path, GEnv.Render->getShaderPath(), fn);
         FS.update_path(path, "$game_shaders$", path);
+#if defined(WINDOWS)
         while (char* sep = strchr(path, '/')) *sep = '\\';
+#else
+        while (char* sep = strchr(path, '\\')) *sep = '/';
+#endif
 
         // Open and read file, recursively load includes
         IReader* R = FS.r_open(path);