pidgin/pidgin

Don't allow adding a buddy to prpls that don't have an add_buddy callback. Fixes #4061
EXTRA_DIST = Makefile.mingw
DIST_SUBDIRS = bonjour gg irc jabber novell null oscar sametime silc silc10 simple zephyr
SUBDIRS = $(DYNAMIC_PRPLS) $(STATIC_PRPLS)