Fix make headercheck.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7923 2fb0f335-1f38-0410-981e-8018bf24f1b0

doc/handbook/Makefile.am

@@ -40,11 +40,10 @@ dumux-handbook.pdf: $(TEXSOURCE)
 
 EXTRA_TEXINPUTS=$(top_srcdir)
 
-include $(top_srcdir)/am/global-rules
-include $(top_srcdir)/am/latex
-
 else
 doc:
 	echo -n ""
 endif
 
+include $(top_srcdir)/am/global-rules
+include $(top_srcdir)/am/latex