Minor: Typo in error message

[hsauro]

I spotted a minor typo in an error message in WrapDelphi.pas, line 1024

rs_ErrInvalidRet = 'Call "%s" returned a value that could not be coverted to Python'#$A'Error: %s';

should be

rs_ErrInvalidRet = 'Call "%s" returned a value that could not be converted to Python'#$A'Error: %s';

The following line (1025) also has a minor typo:

rs_IncompatibleArguments = 'Expected and actual arguements are incompatible';

should be

rs_IncompatibleArguments = 'Expected and actual arguments are incompatible';