[Bug analyzer/97116] Fix argument numbering in C++ member function calls

[dmalcolm at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97116

--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
The C++ FE has %P for printing parm indices, with index < 0 printed as "this";
implemented in cp/error.c: parm_to_string as called from cp_printer.