Fix build if -D_FILE_OFFSET_BITS=64 is set manually.

diff --git a/zlib.h b/zlib.h
index bb717e08c7a9ecd6d31d6b7a7b3286e522d52caa..edf92242df5137bf9f6171af5aa8612f8bc8ba2d 100644 (file)
--- a/zlib.h
+++ b/zlib.h
@@ -1794,7 +1794,7 @@ Z_EXTERN int Z_EXPORT gzgetc_(gzFile file);  /* backward compatibility */
    Z_EXTERN void Z_EXPORT crc32_combine_gen64(uint32_t *op, z_off64_t);
 #endif
 
-#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64)
+#if !defined(Z_INTERNAL) && defined(Z_WANT64)
 #    define gzopen gzopen64
 #    define gzseek gzseek64
 #    define gztell gztell64