Fix const warning.

diff --git a/test/minigzip.c b/test/minigzip.c
index 80f4c12c99fb17877d6d88189926ced1232947bc..0a0bea5294326dc9e2b6fa34a0fb79a2e722d026 100644 (file)
--- a/test/minigzip.c
+++ b/test/minigzip.c
@@ -78,7 +78,7 @@ typedef struct gzFile_s {
     FILE *file;
     int write;
     int err;
-    char *msg;
+    const char *msg;
     z_stream strm;
 } *gzFile;