Add -Wextra and fix warnings.

When adding -Wextra we also add -Wno-ununsed-parameters since that
function means well enough, but is really annoying in practice.

So the warnings we fix here are basically all comparsions between
signed and unsigned values.

1 files changed, 2 insertions, 1 deletions

diff --git a/xutil.c b/xutil.c
index 26761d78..6fa5eb0d 100644
--- a/xutil.c
+++ b/xutil.c
@@ -113,7 +113,8 @@ int
 xregexec (const regex_t *preg, const char *string,
 	  size_t nmatch, regmatch_t pmatch[], int eflags)
 {
-    int i, rerr;
+    unsigned int i;
+    int rerr;
 
     rerr = regexec (preg, string, nmatch, pmatch, eflags);
     if (rerr)