Temporarily fix boolean operation bug

[TurkeyBilly]

#1711

Motivation

solution full credits to @widcardw
Just helping to upload this

class DifferenceExample(Scene):
    def construct(self):
        cir1 = Circle(radius=3).move_to(LEFT * 1.5)
        cir2 = cir1.copy().move_to(RIGHT * 1.5)
        d = Difference(cir1, cir2, color=YELLOW, fill_opacity=0.4)
        self.add(cir1, cir2, d)

class ExclusionExample(Scene):
    def construct(self):
        cirs = VGroup(*[
            Circle(radius=2).move_to(1.5 * np.array([
                np.cos(i / 3 * TAU), np.sin(i / 3 * TAU), 0
            ])) for i in range(3)
        ])
        e = Exclusion(*cirs, color=YELLOW, fill_opacity=0.4)
        self.add(cirs, e)

class IntersectionExample(Scene):
    def construct(self):
        cir1 = Circle(radius=3).move_to(LEFT * 1.5)
        cir2 = cir1.copy().move_to(RIGHT * 1.5)
        i = Intersection(cir1, cir2, color=YELLOW, fill_opacity=0.4)
        self.add(cir1, cir2, i)

class UnionExample(Scene):
    def construct(self):
        cir1 = Circle(radius=3).move_to(LEFT * 1.5)
        cir2 = cir1.copy().move_to(RIGHT * 1.5)
        u = Union(cir1, cir2, color=YELLOW, fill_opacity=0.4)
        self.add(cir1, cir2, u)

Proposed changes

Test

Code: same code

Result:

[TonyCrane]

Similar to #1713, but I don't know why.