Declare 'len' as size_t to avoid unneccessary back-and-forth conversions

Fixes clang warnings:

xdpyinfo.c:1463:12: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
        int len = strlen(arg);
            ~~~   ^~~~~~~~~~~
xdpyinfo.c:1465:32: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        if (!strncmp("-display", arg, len)) {
             ~~~~~~~                  ^~~
xdpyinfo.c:1468:47: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        } else if (!strncmp("-queryExtensions", arg, len)) {
                    ~~~~~~~                          ^~~
xdpyinfo.c:1470:35: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        } else if (!strncmp("-ext", arg, len)) {
                    ~~~~~~~              ^~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/xdpyinfo.c b/xdpyinfo.c
index fdf2515..c08748c 100644
--- a/xdpyinfo.c
+++ b/xdpyinfo.c
@@ -1460,7 +1460,7 @@ main(int argc, char *argv[])
 
     for (i = 1; i < argc; i++) {
 	char *arg = argv[i];
-	int len = strlen(arg);
+	size_t len = strlen(arg);
 
 	if (!strncmp("-display", arg, len)) {
 	    if (++i >= argc) usage ();