[master] f9e1dd9 revert ALLSPHINXOPTS from the previous commit

[Nils Goroll]

commit f9e1dd9455eb6ce4e54074b5616cdeed22e4da1e
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Sep 29 16:56:56 2014 +0200

    revert ALLSPHINXOPTS from the previous commit

diff --git a/doc/sphinx/Makefile.am b/doc/sphinx/Makefile.am
index c872ddd..ba098ca 100644
--- a/doc/sphinx/Makefile.am
+++ b/doc/sphinx/Makefile.am
@@ -10,7 +10,7 @@ BUILDDIR      = build
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4
 PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(distdir)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(srcdir)
 
 .PHONY: help clean html dirhtml pickle json htmlhelp qthelp latex changes linkcheck doctest