dix: unexport SwapLongs()

Not used by any external drivers, so no need to keep it in public SDK.
Since it's used by internal modules, still needs to be _X_EXPORT'ed.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

glx/glxcmdsswap.c

@@ -31,6 +31,9 @@
 #include <dix-config.h>
 
 #include <string.h>
+
+#include "dix/dix_priv.h"
+
 #include "glxserver.h"
 #include "glxutil.h"
 #include <GL/glxtokens.h>