inotifyd: fix "inotifyd with no params" case

include/usage.h

@@ -1847,7 +1847,7 @@
      "\n1. actual event(s)" \
      "\n2. file name" \
      "\n3. name of subfile (if any), in case of watching a directory" \
-     "\ninotify waits for agent to exit." \
+     "\ninotifyd waits for agent to exit." \
      "\nEvents:" \
      "\n	a	File is accessed" \
      "\n	c	File is modified" \

miscutils/inotifyd.c

@@ -58,7 +58,7 @@ int inotifyd_main(int argc UNUSED_PARAM, char **argv)
 	const char *args[] = { *argv, NULL, NULL, NULL, NULL };
 
 	// sanity check: agent and at least one watch must be given
-	if (!argv[1])
+	if (!argv[0] || !argv[1])
 		bb_show_usage();
 
 	// open inotify