pack isLegal: remove the need for some casting

diff --git a/lib/pack/ccomps.c b/lib/pack/ccomps.c
index 86ce2dd48b5e9f6fa873c30dec009350f78e4e70..4dc9abbb318685fd8e69d7c467e692d037599793 100644 (file)
--- a/lib/pack/ccomps.c
+++ b/lib/pack/ccomps.c
@@ -84,10 +84,10 @@ static size_t dfs(Agraph_t * g, Agnode_t * n, void *state, stk_t* stk)
 
 static int isLegal(char *p)
 {
-    unsigned char c;
+    char c;
 
-    while ((c = *(unsigned char *) p++)) {
-       if (c != '_' && !isalnum(c))
+    while ((c = *p++)) {
+       if (c != '_' && !isalnum((int)c))
            return 0;
     }