Fixed a regression causing a crash as some functions with no symbols are allowed to reach code generation.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>
Fixed the check for duplicate names to ignore hidden return parameters.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>
Merge pull request #44 from ddobrev/duplicates_ignore_hidden_args

Duplicates ignore hidden args