I think this code is syntactically correct, but can cause problems in debugging. If you don't scrutinize the code too carefully you can waste time here - code was a cut and paste from strcpy to integer assignment with resultant comma not changed to assignment.
// this code does nothing ! f -> font_size, current_font_size; // this code does something f -> font_size= current_font_size; should this produce a warning like "statement does nothing" ? its like an unused variable warning, it is a courtesy thing.. -- Summary: syntatic warning Product: gcc Version: 4.1.2 Status: UNCONFIRMED Severity: trivial Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: robert dot lore at opensyscon dot com dot au GCC build triplet: same GCC host triplet: x86 linux (redhat) gcc GCC target triplet: same http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36708