forward-declare delMacroAll

forward-declare delMacroAll

somewhy build on ac started to complain and that errored out:

amd64-pld-linux-gcc -DHAVE_CONFIG_H -I. -I.. -I. -I.. -I/usr/include/beecrypt -I../lua/include -I../lua/local -I../misc -I/usr/include/ossp-uuid -I/usr/include/db4.5 -O2 -fno-strict-aliasing -gdwarf-2 -g2 -fPIC -DPIC -D_GNU_SOURCE -D_REENTRANT -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wno-char-subscripts -MT macro.lo -MD -MP -MF .deps/macro.Tpo -c macro.c  -fPIC -DPIC -o .libs/macro.o
macro.c: In function `doUnglobal':
macro.c:840: warning: implicit declaration of function `delMacroAll'
macro.c: At top level:
macro.c:2028: warning: no previous prototype for 'delMacroAll'
macro.c:2028: error: conflicting types for 'delMacroAll'
macro.c:840: error: previous implicit declaration of 'delMacroAll' was here
make[2]: *** [macro.lo] Error 1