message: fix standalone build system
diff: @@ -36,7 +36,7 @@ INCLUDEPATHSSYSTEM += $(shell root-config --incdir)
  LIBSUSE += $(shell root-config --libs)
  endif
  -ALLDEP += config_common.mak
  +ALLDEP += config_common.mak config_options.mak
  o2:
  make CONFIGFILE=config_o2.mak -f makefile
  