testcpg: fix build warning

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>
(cherry picked from commit 514f2a13bd7d3d760c9f3abd8629ba37b7433236)

test/testcpg.c

@@ -105,8 +105,9 @@ print_time(void)
 
 	len = sizeof(hostname);
 	if(gethostname(hostname, len) == 0) {
+		char *longName;
 		hostname[len-1] = '\0';
-		char *longName = hostname;
+		longName = hostname;
 		if( (longName = strstr( hostname, "." )) != NULL )
 		*longName = '\0';
 	}