Move tocdepth definition to above of user-preamble (ref #2358)

CHANGES

@@ -30,6 +30,7 @@ Bugs fixed
 * #1565, #2229: Revert new warning; the new warning will be triggered from version 1.4 on.
 * #2329: Refresh environment forcely if source directory has changed.
 * #2019: Fix the domain objects in search result are not escaped
+* #2358: Fix user-preamble could not override the tocdepth definition.
 
 Release 1.3.5 (released Jan 24, 2016)
 =====================================

sphinx/writers/latex.py

@@ -48,6 +48,7 @@ HEADER = r'''%% Generated by Sphinx.
 %(usepackages)s
 %(contentsname)s
 %(numfig_format)s
+%(tocdepth)s
 %(preamble)s
 
 \title{%(title)s}
@@ -56,7 +57,6 @@ HEADER = r'''%% Generated by Sphinx.
 \author{%(author)s}
 \newcommand{\sphinxlogo}{%(logo)s}
 \renewcommand{\releasename}{%(releasename)s}
-%(tocdepth)s
 %(makeindex)s
 '''