Update Effects.cpp for consistent behavior when rendering special patterns

[LeandroLibanio28H]

The current rendering behavior of spell effects with patternX = 2 and patternY = 2 exhibits inconsistency, as demonstrated in the provided video:

wrong_spell_effect.mp4

As an example, I've modified the "Eternal Winter" spell area to the following:

local area = {
	{0, 0, 0, 1, 0, 0, 0},
	{0, 0, 1, 1, 1, 0, 0},
	{0, 1, 1, 1, 1, 1, 0},
	{1, 1, 1, 2, 1, 1, 1},
	{0, 1, 1, 1, 1, 1, 0},
	{0, 0, 1, 1, 1, 0, 0},
	{0, 0, 0, 1, 0, 0, 0},
}

The spell pattern rendering is incompatible with the designated combat area. This pull request aims to rectify the issue by adjusting the effect rendering pattern formula to consistently align with the desired combat area, regardless of the pattern the object possesses.