[Vala] Problem converting library

[Nicolas <c r n a wanadoo fr>]

Hi,

I'm trying to port a non Glib library, and i have some problems.
For example, when vala-gen-introspect try to convert this:

GAULFUNC population *ga_genesis_integer( const int           
population_size,
                       const int               num_chromo,
                       const int               len_chromo,
                       GAgeneration_hook       generation_hook,    (!!! 
this is the line 507 !!!)
                       GAiteration_hook        iteration_hook,
                       GAdata_destructor       data_destructor,
                       GAdata_ref_incrementor  data_ref_incrementor,
                       GAevaluate              evaluate,
                       GAseed                  seed,
                       GAadapt                 adapt,
                       GAselect_one            select_one,
                       GAselect_two            select_two,
                       GAmutate                mutate,
                       GAcrossover             crossover,
                       GAreplace               replace,
                       vpointer        userdata );

It return:

/usr/local/include/gaul.h:507: syntax error, unexpected identifier
/usr/local/include/gaul.h:509: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:510: syntax error, unexpected identifier, 
expecting ',' or ';'
/usr/local/include/gaul.h:512: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:513: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:514: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:515: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:516: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:517: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'
/usr/local/include/gaul.h:518: syntax error, unexpected typedef-name, 
expecting identifier or '(' or '*'

Do you know what can i do to resolve this problem ?

Thanks in advance to everyone who can help me.
Nicolas.