Fixup for missing code in #896 (#900)
Fixup for missing code in #896 (#900)

The `tuple` case in `getPointedToType` was failing to add the elements it computed to the output tuple type.
This isn't triggered in any of our test cases, but was caught by some work I was doing in another branch.
shader-slang/slang,csyonghe/slang,csyonghe/slang,shader-slang/slang,shader-slang/slang,csyonghe/slang