RestrictedTemplateIntersection[t1,t1] results in {} instead of t1

[mverardo]

In := t1 = BuildTemplate[3, 1.0, {2, x1 \[Element] {0, 2}, 0}, RestrictedExpansion];
In := t2 = BuildTemplate[3, 1.0, {2, x1, 0}, RestrictedExpansion];
In := TemplateIntersection[t1, t2] 
Out = <|"k" -> 3, "r" -> 1., "rawList" -> {}, "expansionFunction" -> RestrictedExpansion|>

Out should be

<|"k" -> 3, "r" -> 1., "rawList" -> {2, x1 \[Element] {0, 2}, 0}, "expansionFunction" -> RestrictedExpansion|>

[mverardo]

Fixed on #52