Use wtokenfree whenever there is wtokensplit

Whenever wtokensplit is used to split into argv/argc, it's better to
use the built-in function wtokenfree() as a wfree call only on argv
is not freeing the memory properly.

src/main.c

@@ -393,7 +393,7 @@ Bool RelaunchWindow(WWindow *wwin)
 	} else if (pid < 0) {
 		werror("cannot fork a new process");
 
-		wfree(argv);
+		wtokenfree(argv, argc);
 		wfree(command);
 		return False;
 	} else {
@@ -405,7 +405,7 @@ Bool RelaunchWindow(WWindow *wwin)
 		/* not actually a shell command */
 		wAddDeathHandler(pid, shellCommandHandler, data);
 
-		wfree(argv);
+		wtokenfree(argv, argc);
 	}
 
 	return True;

src/session.c

@@ -392,9 +392,7 @@ static pid_t execCommand(WScreen *scr, char *command)
 		execvp(argv[0], args);
 		exit(111);
 	}
-	while (argc > 0)
+	wtokenfree(argv, argc);
-		wfree(argv[--argc]);
-	wfree(argv);
 	return pid;
 }
 

util/wmgenmenu.c

@@ -451,7 +451,7 @@ static void find_and_write(const char *group, char *list[][2], int this_is_termi
 			WMAddToPLArray(L2Menu, L3Menu);
 			wfree(t);
 		}
-		wfree(argv);
+		wtokenfree(argv, argc);
 		i++;
 	}
 	if (L2Menu)