Fix buffer overflow in "ydotool mousemove"

Author: lxylxy123456

Client/tool_mousemove.c

@@ -107,10 +107,18 @@ int tool_mousemove(int argc, char **argv) {
 				is_wheel = 1;
 				break;
 			case 'x':
+				if (i >= 2) {
+					show_help();
+					return 1;
+				}
 				pos[0] = strtol(optarg, NULL, 10);
 				i++;
 				break;
 			case 'y':
+				if (i >= 2) {
+					show_help();
+					return 1;
+				}
 				pos[1] = strtol(optarg, NULL, 10);
 				i++;
 				break;