Author: WANG Yunfeng <uhuruh@gmail.com>
Description: Don't treat skill null parameter as 0
Bug-Debian: http://bugs.debian.org/551173
--- a/skill.c
+++ b/skill.c
@@ -307,7 +307,7 @@
     long pid;
     char *endp;
     pid = strtol(argv[argc],&endp,10);
-    if(!*endp){
+    if(!*endp && (endp != argv[argc])){
       if(!kill((pid_t)pid,signo)) continue;
       // The UNIX standard contradicts itself. If at least one process
       // is matched for each PID (as if processes could share PID!) and