regex: prevent two improbable signed integer overflows.

In matcher() we used an integer to index nsub of type size_t.
In print() we used an integer to index nstates of type sopno,
typedef'd long.
In both cases the indexes never take negative values.

Match the types to avoid any error.

MFC after:	5 days

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/libc/regex/engine.c b/lib/libc/regex/engine.c
index 436370d..77baa7e 100644
--- a/lib/libc/regex/engine.c
+++ b/lib/libc/regex/engine.c
@@ -154,7 +154,7 @@ matcher(struct re_guts *g,
 	int eflags)
 {
 	const char *endp;
-	int i;
+	size_t i;
 	struct match mv;
 	struct match *m = &mv;
 	const char *dp = NULL;
@@ -1108,7 +1108,7 @@ print(struct match *m,
 	FILE *d)
 {
 	struct re_guts *g = m->g;
-	int i;
+	sopno i;
 	int first = 1;
 
 	if (!(m->eflags&REG_TRACE))