Crash fixes, multimesh support

mobs/bat.lua

@@ -204,4 +204,4 @@ creatura.register_mob("animalia:bat", {
 creatura.register_spawn_item("animalia:bat", {
 	col1 = "392517",
 	col2 = "321b0b"
-})
+})

mobs/cat.lua

@@ -323,9 +323,12 @@ creatura.register_mob("animalia:cat", {
 		self:memorize("trust", self.trust)
 	end,
 	deactivate_func = function(self)
-		if self.owner
-		and animalia.pets[self.owner][self.object] then
-			animalia.pets[self.owner][self.object] = nil
+		if self.owner then
+			for i, object in ipairs(animalia.pets[self.owner] or {}) do
+				if object == self.object then
+					animalia.pets[self.owner][i] = nil
+				end
+			end
 		end
 	end
 })

mobs/tropical_fish.lua

@@ -18,16 +18,23 @@ creatura.register_mob("animalia:tropical_fish", {
 	boid_seperation = 0.3,
 	bouyancy_multiplier = 0,
 	-- Visuals
-	mesh = "animalia_clownfish.b3d",
+	meshes = {
+		"animalia_clownfish.b3d",
+		"animalia_angelfish.b3d"
+	},
 	hitbox = {
 		width = 0.15,
 		height = 0.3
 	},
-	visual_size = {x = 7, y = 7},
-	textures = {
-		"animalia_clownfish.png",
-		"animalia_blue_tang.png",
-		"animalia_angelfish.png"
+	visual_size = {x = 10, y = 10},
+	mesh_textures = {
+		{
+			"animalia_clownfish.png",
+			"animalia_blue_tang.png"
+		},
+		{
+			"animalia_angelfish.png"
+		}
 	},
 	animations = {
 		swim = {range = {x = 1, y = 20}, speed = 20, frame_blend = 0.3, loop = true},
@@ -61,11 +68,6 @@ creatura.register_mob("animalia:tropical_fish", {
 	activate_func = function(self)
 		animalia.initialize_api(self)
 		animalia.initialize_lasso(self)
-		if self.texture_no == 3 then
-			self.object:set_properties({
-				mesh = "animalia_angelfish.b3d",
-			})
-		end
 	end,
 	step_func = function(self)
 		animalia.step_timers(self)