xscreensaver 5.17 compilation fix

--- a/hacks/glx/Makefile.in 2012-06-23 12:55:50.987585034 -0400
+++ b/hacks/glx/Makefile.in 2012-06-23 12:56:05.380840847 -0400
@@ -1832,7 +1832,7 @@
 lament.o: ../../config.h
 lament.o: $(HACK_SRC)/fps.h
 lament.o: $(srcdir)/gltrackball.h
-lament.o: $(HACK_SRC)/images/lament.xpm
+lament.o: $(HACK_SRC)/images/lament512.xpm
 lament.o: $(srcdir)/jwzgles.h
 lament.o: $(srcdir)/normals.h
 lament.o: $(srcdir)/rotator.h