tvintris: fix else cases

vlib/sdl/examples/tvintris/tvintris.v

@@ -398,6 +398,7 @@ fn main() {
 					game.handle_jhat(jh, jv, joyid)
 					game2.handle_jhat(jh, jv, joyid)
 				}
+				else {}
 			}
 		}
 		if should_close {
@@ -445,6 +446,7 @@ fn (game mut Game) handle_key(key int) {
 	match key {
 		C.SDLK_SPACE { action = .space }
 		game.k_fire { action = .fire }
+		else {}
 	}
 
 	if action == .space {
@@ -457,6 +459,7 @@ fn (game mut Game) handle_key(key int) {
 					C.Mix_ResumeMusic()
 					game.state = .running
 				}
+				else {}
 			}
 	}
 
@@ -466,6 +469,7 @@ fn (game mut Game) handle_key(key int) {
 					game.init_game()
 					game.state = .running
 				}
+				else {}
 			}
 	}
 	if game.state != .running { return }
@@ -475,6 +479,7 @@ fn (game mut Game) handle_key(key int) {
 		game.k_left { game.move_right(-1) }
 		game.k_right { game.move_right(1) }
 		game.k_down { game.move_tetro() } // drop faster when the player presses <down>
+		else {}
 	}
 }
 
@@ -486,6 +491,7 @@ fn (game mut Game) handle_jbutton(jb int, joyid int) {
 	mut action := Action(.idle)
 	match jb {
 		game.jb_fire { action = .fire }
+		else {}
 	}
 
 	if action == .fire {
@@ -494,6 +500,7 @@ fn (game mut Game) handle_jbutton(jb int, joyid int) {
 					game.init_game()
 					game.state = .running
 				}
+				else {}
 			}
 	}
 }
@@ -510,6 +517,7 @@ fn (game mut Game) handle_jhat(jh int, jv int, joyid int) {
 		game.jh_left { game.move_right(-1) }
 		game.jh_right { game.move_right(1) }
 		game.jh_down { game.move_tetro() } // drop faster when the player presses <down>
+		else {}
 	}
 }