fix endian detection problems for sparc

gfx/src/xlibrgb/xlibrgb.c

@@ -66,10 +66,22 @@
 #define G_LITTLE_ENDIAN 1
 #define G_BIG_ENDIAN 2
 
-/* check our endianness */
-#if USE_MOZILLA_TYPES
+/* include this before so that we can get endian definitions if
+   they are there... */
 
-#if IS_LITTLE_ENDIAN
+#include "xlibrgb.h"
+
+/* check our endianness */
+#ifdef USE_MOZILLA_TYPES
+
+/* check to make sure that we don't have both types defined. */
+#ifdef IS_LITTLE_ENDIAN
+#ifdef IS_BIG_ENDIAN
+#error what the hell?  both endian types are defined!
+#endif
+#endif
+
+#ifdef IS_LITTLE_ENDIAN
 #define G_BYTE_ORDER G_LITTLE_ENDIAN
 #else
 #define G_BYTE_ORDER G_BIG_ENDIAN
@@ -90,8 +102,6 @@
 #define MAX(a, b)  (((a) > (b)) ? (a) : (b))
 #endif
 
-#include "xlibrgb.h"
-
 typedef enum {
   LSB_FIRST,
   MSB_FIRST

gfx/src/xlibrgb/xlibrgb.h

@@ -65,7 +65,7 @@ extern "C" {
  * you will need to set these defines.  It's pretty easy for Intel
  * but I'm not sure about other platforms.
  */
-#if USE_MOZILLA_TYPES
+#ifdef USE_MOZILLA_TYPES
 /* prtypes contains definitions for uint32/int32 and uint16/int16 */
 #include "prtypes.h"
 #include "prcpucfg.h"