Merge pull request #550 from pwpiwi/fix_warnings

[proxmark3-svn] / client / reveng / model.c

diff --git a/client/reveng/model.c b/client/reveng/model.c
index 2d45b2fe1f9b29ebaf779bd1a532f504df4a628b..5a9b6580449dd20a7343f1e1e1c3e52ee4e28996 100644 (file)
--- a/client/reveng/model.c
+++ b/client/reveng/model.c
@@ -596,7 +596,7 @@ mbynam(model_t *dest, const char *key) {
                uerror("cannot allocate memory for comparison string");
        akey.name = uptr = ukey;
        do
-               *uptr++ = toupper(*key);
+               *uptr++ = toupper((unsigned char)*key);
        while(*key++);
 
        aptr = bsearch(&akey, aliases, NALIASES, sizeof(struct malias), (int (*)(const void *, const void *)) &acmp);