diff -r 099aa5d655de -r 933c0dccc82f stage3/fill_candidate_datatypes.hh
--- a/stage3/fill_candidate_datatypes.hh	Thu Feb 23 13:25:49 2012 +0000
+++ b/stage3/fill_candidate_datatypes.hh	Sat Feb 25 19:16:35 2012 +0000
@@ -84,7 +84,7 @@
     /* Match a function declaration with a function call through their parameters.*/
     /* returns true if compatible function/FB invocation, otherwise returns false */
     bool match_nonformal_call(symbol_c *f_call, symbol_c *f_decl);
-    bool match_formal_call   (symbol_c *f_call, symbol_c *f_decl);
+    bool match_formal_call   (symbol_c *f_call, symbol_c *f_decl, symbol_c **first_param_datatype = NULL);
     void handle_function_call(symbol_c *fcall, generic_function_call_t fcall_data);
     void handle_implicit_il_fb_call(symbol_c *il_instruction, const char *param_name, symbol_c *&called_fb_declaration);