Make internal SDL sources include SDL_internal.h instead of SDL_config.h

The new header will include SDL_config.h, but allows for other global stuff.

src/stdlib/SDL_getenv.c

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../SDL_internal.h"
 
 #if defined(__WIN32__)
 #include "../core/windows/SDL_windows.h"

src/stdlib/SDL_iconv.c

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../SDL_internal.h"
 
 /* This file contains portable iconv functions for SDL */
 

src/stdlib/SDL_malloc.c

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../SDL_internal.h"
 
 /* This file contains portable memory management functions for SDL */
 

src/stdlib/SDL_qsort.c

@@ -41,7 +41,7 @@
  *
  * Gareth McCaughan   Peterhouse   Cambridge   1998
  */
-#include "SDL_config.h"
+#include "../SDL_internal.h"
 
 /*
 #include <assert.h>

src/stdlib/SDL_stdlib.c

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../SDL_internal.h"
 
 /* This file contains portable stdlib functions for SDL */
 

src/stdlib/SDL_string.c

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../SDL_internal.h"
 
 /* This file contains portable string manipulation functions for SDL */