Fix possible NULL pointer dereference (#433)

cppcheck:
  [src/manifest.c:270] -> [src/manifest.c:269]: (warning)
  Either the condition '!errmsg' is redundant or there is possible null pointer
  dereference: errmsg.

diff --git a/src/manifest.c b/src/manifest.c
index 00da5424e49849b9f232b8cdab58d934e392273d..6de842d2cb47573f0f18e914a0f378686c3d1db5 100644 (file)
--- a/src/manifest.c
+++ b/src/manifest.c
@@ -266,7 +266,7 @@ read_manifest(gzFile f, char **errmsg)
        return mf;
 
 error:
-       if (!errmsg) {
+       if (!*errmsg) {
                *errmsg = x_strdup("Corrupt manifest file");
        }
        free_manifest(mf);