added comment

Author: staabm

src/Analyser/TypeSpecifier.php

@@ -338,6 +338,7 @@ public function specifyTypesInCondition(
 				if (
 					$context->true()
 					&& !$orEqual
+					// constant offsets are handled via HasOffsetType/HasOffsetValueType
 					&& !$leftType instanceof ConstantIntegerType
 					&& $argType->isList()->yes()
 					&& IntegerRangeType::fromInterval(0, null)->isSuperTypeOf($leftType)->yes()