Remove unintentional semicolon after if()

Also changed some other instances of the if(); pattern to use an empty
block in order to suppress the new warning.

planet/Objects.ocd/Animals.ocd/Squid.ocd/Script.c

@@ -299,8 +299,8 @@ private func UpdateSwim()
 	
 	// the animation to play depends on the speed of the squid
 	var is_fast = velocity >= SQUID_SWIM_MAX_SPEED/3;
-	if (is_fast && !is_in_idle_animation); // no change needed
-	else if (!is_fast && is_in_idle_animation); // ok, too
+	if (is_fast && !is_in_idle_animation) {} // no change needed
+	else if (!is_fast && is_in_idle_animation) {} // ok, too
 	else
 	{
 		var current_weight = GetAnimationWeight(movement_animation_node);

planet/Objects.ocd/Environment.ocd/Cloud.ocd/Script.c

@@ -317,7 +317,7 @@ private func Precipitation()
 	// Precipitaion: water or snow.
 	if (rain > 0)
 	{
-		if (RainDrop());
+		if (RainDrop())
 			rain--;	
 	}	
 	// If out of liquids, skip mode.

planet/Objects.ocd/Vegetation.ocd/SproutBerryBush.ocd/Sprout.ocd/Script.c

@@ -189,8 +189,6 @@ func FxLifeTimerTimer(target, effect, time)
 		var t = GetActionTarget();
 		if(!t) return;
 		
-		if(!Random(10))
-			;//Die();
 		if(!Random(10))
 		{
 			if(attached_flower != -1)

planet/Objects.ocd/Vehicles.ocd/Airship.ocd/Script.c

@@ -128,7 +128,9 @@ public func FxIntAirshipMovementTimer(object target, proplist effect, int time)
 
 	// Wind movement if in the air
 	if (!GetContact(-1))
-		/* TODO: Implement */;
+	{
+		/* TODO: Implement */
+	}
 
 	// Fall down if there no pilot and ground.
 	if (!HasAirshipPilot())