#523 delayed error reporting for function prototypes with missing terminating semicolon

[alvin]

I believe this occurs because sdcc partially understands K&R syntax so that recognition of the error is delayed until later in the front end. The delayed error reporting can cause grief in debugging but is otherwise unharmful.

Example:

void just_some_function(int some_param)   // <=== forgot ;

int a;

void some_other_function(int some_param)
{                                                               // <=== syntax error report on '{'
   // blabla
}

sdcc is unable to determine there is an error until it's inside some_other_function(). It should be able to report an error at "int a;". This is an error under K&R because "a" does not match the name of any parameter given to just_some_function() and I think it goes undetected until later because an early pass understands K&R so the error is not caught until later steps.

A more competer description:
https://github.com/z88dk/z88dk/issues/38