Early returns were erroneous and were causing memory leaks

Change-Id: Ifd6e37d79b6abd3f7d8d8899c951f1a0b4a66fb0
Reviewed-on: https://swiftshader-review.googlesource.com/19588Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>