Fix burning CPU with udev disabled on Flatpak

Fixes #67355.

(cherry picked from commit 0cbd1c85a96384ef93978661e408ce7c1b721847)

platform/x11/joypad_linux.cpp

@@ -222,8 +222,8 @@ void JoypadLinux::monitor_joypads() {
 			}
 		}
 		closedir(input_directory);
+		usleep(1000000); // 1s
 	}
-	usleep(1000000); // 1s
 }
 
 void JoypadLinux::close_joypads() {