install pixmaps correctly. see #2563

data/pixmaps/Makefile.am

 pixmapsdir = $(pkgdatadir)/data/pixmaps
 pixmaps_DATA = $(srcdir)/*.png \
-			   gajim.ico \
-			   $(srcdir)/events/*.png \
-			   $(srcdir)/agents/*.png
-EXTRA_DIST = $(pixmaps_DATA)
+			   gajim.ico
+
+pixmapseventsdir = $(pkgdatadir)/data/pixmaps/events
+pixmapsevents_DATA = $(srcdir)/events/*.png
+
+pixmapsagentsdir = $(pkgdatadir)/data/pixmaps/agents
+pixmapsagents_DATA = $(srcdir)/agents/*.png
+
+EXTRA_DIST = $(pixmaps_DATA) $(pixmapsevents_DATA) $(pixmapsagents_DATA)
 
 gajimpixmapdir = $(datadir)/pixmaps
 gajimpixmap_DATA = gajim.png \