[awesome-message] Check that delay is an integer greater than 0

Signed-off-by: Julien Danjou <julien@danjou.info>

awesome-message.1.txt

@@ -30,7 +30,7 @@ OPTIONS
 -y ycoord::
     Set y coordinate of the window.
 -d delay::
-    Close the window after <delay> seconds.
+    Close the window after <delay> seconds. Must be an integer greater than 0.
 <message>::
     Print this message in the window.
 <icon>::

awesome-message.c

@@ -144,7 +144,8 @@ main(int argc, char **argv)
         switch(opt)
         {
 	  case 'd':
-	    delay = atoi(optarg);
+	    if((delay = atoi(optarg)) <= 0)
+                delay = 1;
 	    break;
           case 'v':
             eprint_version(PROGNAME);