Nerfed squishing

After fixing flashing tics not being set properly, 2 seconds of being fully stopped and then another 1.5 seconds minimum of being unable to be hit just feels like an eternity :V

src/k_kart.c

@@ -1940,7 +1940,7 @@ void K_SquishPlayer(player_t *player, mobj_t *source)
 		K_CheckBumpers();
 	}
 
-	player->kartstuff[k_squishedtimer] = 2*TICRATE;
+	player->kartstuff[k_squishedtimer] = TICRATE;
 
 	player->powers[pw_flashing] = K_GetKartFlashing(player);