lib/Support/regcomp.c: Fix cygwin warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127241 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/regcomp.c b/lib/Support/regcomp.c
index cd018d5dc5bc4d3628dcacbff4d72b1cb0cfc53f..46c91a9c497cda8cdc7ccf8fb73df0441fb7bd83 100644 (file)
--- a/lib/Support/regcomp.c
+++ b/lib/Support/regcomp.c
@@ -780,7 +780,7 @@ p_b_cclass(struct parse *p, cset *cs)
        const char *u;
        char c;
 
-       while (MORE() && isalpha(PEEK()))
+       while (MORE() && isalpha((uch)PEEK()))
                NEXT();
        len = p->next - sp;
        for (cp = cclasses; cp->name != NULL; cp++)