Finalized Fortran highlighting...

xighlight.c

@@ -346,6 +346,8 @@ int main (int argc, char * * argv) {
 			highlight_common_assembly ();
 		} else if (select == file_type_flat_assembly) {
 			highlight_flat_assembly ();
+		} else if (select == file_type_fortran_90) {
+			highlight_fortran ();
 		} else {
 			highlight_common ();
 		}