xprop: update to 1.2.3.

Alan Coopersmith (5):
      configure: Drop AM_MAINTAINER_MODE
      autogen.sh: Honor NOCONFIGURE=1
      Print which option was in error along with usage message
      Add -version option to print program version
      xprop 1.2.3

Eirik Byrkjeflot Anonsen (4):
      Free the thunks used by Show_Prop
      Free the data returned by XListProperties()
      Free the data returned by XGetWindowProperty()
      Free the data returned by Format_Icons()

Emil Velikov (1):
      autogen.sh: use quoted string variables

Mihail Konev (1):
      autogen: add default patch prefix

Peter Hutterer (1):
      autogen.sh: use exec instead of waiting for configure to finish

(wiz)