Fix S3TC compilation on Linux.

src/GLES2/libEGL/libEGL.cpp

@@ -1127,7 +1127,7 @@ EGLImageKHR EGLAPIENTRY eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenu
             return error(EGL_BAD_MATCH, EGL_NO_IMAGE_KHR);
         }
 
-        GLuint name = (GLuint)buffer;
+        GLuint name = reinterpret_cast<intptr_t>(buffer);
 
         if(name == 0)
         {

src/Main/Config.hpp

@@ -16,7 +16,11 @@
 
 #define PERF_HUD 0       // Display time spent on vertex, setup and pixel processing for each thread
 #define PERF_PROFILE 0   // Profile various pipeline stages and display the timing in SwiftConfig
-#define S3TC_SUPPORT (_WIN32)
+#if defined(_WIN32)
+#define S3TC_SUPPORT 1
+#else
+#define S3TC_SUPPORT 0
+#endif
 
 #if PERF_PROFILE
 enum