Merge pull request #679 from almul8ab/patch-2

Fix CVectors.lua

Author: ArranTuna

[gameplay]/superman/vectors/CVectors.lua

@@ -1,25 +1,31 @@
 function newVector3D(posX, posY, posZ)
 	local newVector = {x = posX or 0.0, y = posY or 0.0, z = posZ or 0.0}
-
 	return newVector
 end
 
 function moduleVector3D(vector3D)
+	if not vector3D or type(vector3D.x) ~= "number" then
+		return 0
+	end
 	return math.sqrt(vector3D.x * vector3D.x + vector3D.y * vector3D.y + vector3D.z * vector3D.z)
 end
 
 function normalizeVector3D(vector3D)
+	if not vector3D or type(vector3D.x) ~= "number" then
+		return newVector3D(0, 0, 0)
+	end
 	local mod = moduleVector3D(vector3D)
-
 	if mod ~= 0 then
 		vector3D.x = vector3D.x / mod
 		vector3D.y = vector3D.y / mod
 		vector3D.z = vector3D.z / mod
 	end
-
 	return vector3D
 end
 
 function mulVector3D(vector3D, n)
+	if not vector3D or type(vector3D.x) ~= "number" or type(n) ~= "number" then
+		return newVector3D(0, 0, 0)
+	end
 	return newVector3D(vector3D.x * n, vector3D.y * n, vector3D.z * n)
-end
+end