Fix PyCode_Addr2Location when addrq < 0 (GH-95091)

Author: Fidget-Spinner

Misc/NEWS.d/next/Core and Builtins/2022-07-21-19-19-20.gh-issue-95060.4xdT1f.rst

@@ -0,0 +1,2 @@
+Undocumented ``PyCode_Addr2Location`` function now properly returns when
+``addrq`` argument is less than zero.

Objects/codeobject.c

@@ -971,6 +971,7 @@ PyCode_Addr2Location(PyCodeObject *co, int addrq,
     if (addrq < 0) {
         *start_line = *end_line = co->co_firstlineno;
         *start_column = *end_column = 0;
+        return 1;
     }
     assert(addrq >= 0 && addrq < _PyCode_NBYTES(co));
     PyCodeAddressRange bounds;