Fix 1986/wall to no longer need -traditional-cpp

This was also a lot of fun to fix. It took a fair bit of tinkering but
it was a lot of fun to figure out and now it works like it does with
-traditional-cpp!

Removed this entry from the bugs.md file as it now works.

Also added to the bugs.md a minor clarification about another entry
that is in status INABIAF (about warnings).

1986/wall/Makefile

@@ -114,13 +114,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ=
-ALT_TARGET=
-
-# FORCE use of -traditional-cpp
-#
-CFLAGS+= -traditional-cpp
-
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 #################
 # build the entry
@@ -134,7 +129,6 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
-	@echo "NOTE: This entry requires a compiler that supports -traditional-cpp"
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # alternative executable