Add explicit lint-comment-style fallthrough annotations. GCC now assumes that if you don't have these you're making a mistake, which is annoying. XXX: This changeset updates the AG output files only (by hand) and is XXX: abusive - rebuilding them will erase the change. However, I need XXX: to get things to build before I can try to get AG to issue the XXX: annotations itself, so this seems like a reasonable expedient.

--- a/anagram/agcore/sums.cpp	Mon May 30 23:47:52 2022 -0400
+++ b/anagram/agcore/sums.cpp	Mon May 30 23:51:43 2022 -0400
@@ -901,6 +901,7 @@
         case ag_set_key:
           (PCB).save_index = (PCB).rx;
           (PCB).token_number = (parseSumData_token_type) ag_key_parm[(PCB).key_state];
+	  /* FALLTHROUGH*/
         case ag_jmp_key:
           (PCB).key_state = ag_key_jmp[(PCB).key_state];
           continue;