minizip warning fix if MAXU32 already defined. (gvollant)
diff --git a/contrib/minizip/ioapi.h b/contrib/minizip/ioapi.h
index 8dcbdb0..114bfab 100644
--- a/contrib/minizip/ioapi.h
+++ b/contrib/minizip/ioapi.h
@@ -91,8 +91,7 @@
typedef uint64_t ZPOS64_T;
#else
-/* Maximum unsigned 32-bit value used as placeholder for zip64 */
-#define MAXU32 0xffffffff
+
#if defined(_MSC_VER) || defined(__BORLANDC__)
typedef unsigned __int64 ZPOS64_T;
@@ -102,7 +101,10 @@
#endif
#endif
-
+/* Maximum unsigned 32-bit value used as placeholder for zip64 */
+#ifndef MAXU32
+#define MAXU32 (0xffffffff)
+#endif
#ifdef __cplusplus
extern "C" {
