Simplify int range key super type checks a bit more

Author: herndlm

src/Analyser/TypeSpecifier.php

@@ -1103,8 +1103,7 @@ private function specifyTypesForCountFuncCall(
 				$sizeType instanceof IntegerRangeType
 				&& $sizeType->getMin() !== null
 				&& ($sizeType->getMax() ?? $sizeType->getMin()) <= ConstantArrayTypeBuilder::ARRAY_COUNT_LIMIT
-				&& $arrayType->getKeyType()->isSuperTypeOf(IntegerRangeType::fromInterval(0, $sizeType->getMin() - 1))->yes()
-				&& ($sizeType->getMax() === null || $arrayType->getKeyType()->isSuperTypeOf(IntegerRangeType::fromInterval(0, $sizeType->getMax() - 1))->yes())
+				&& $arrayType->getKeyType()->isSuperTypeOf(IntegerRangeType::fromInterval(0, ($sizeType->getMax() ?? $sizeType->getMin()) - 1))->yes()
 			) {
 				// turn optional offsets non-optional
 				$valueTypesBuilder = ConstantArrayTypeBuilder::createEmpty();