added missing namespace qualification in is_ex_the_function() macro

diff --git a/ginac/function.pl b/ginac/function.pl
index d75e8f6..c76fe75 100755 (executable)
--- a/ginac/function.pl
+++ b/ginac/function.pl
@@ -365,7 +365,7 @@ template<> inline bool is_exactly_a<function>(const basic & obj)
 }
 
 #define is_ex_the_function(OBJ, FUNCNAME) \\
-       (GiNaC::is_exactly_a<GiNaC::function>(OBJ) && GiNaC::ex_to<GiNaC::function>(OBJ).get_serial() == function_index_##FUNCNAME)
+       (GiNaC::is_exactly_a<GiNaC::function>(OBJ) && GiNaC::ex_to<GiNaC::function>(OBJ).get_serial() == GiNaC::function_index_##FUNCNAME)
 
 } // namespace GiNaC