[LyX/master] Fix wrong label found by cppcheck

[Georg Baum]

commit 7450d24eec34346bac4eebe09973b8b6c182c1c1
Author: Georg Baum <b...@lyx.org>
Date:   Sun Sep 20 20:32:45 2015 +0200

    Fix wrong label found by cppcheck
    
    It was not intended to ignore the return value of expandParagraphLabel().

diff --git a/src/Paragraph.cpp b/src/Paragraph.cpp
index 84e609b..5bbc16a 100644
--- a/src/Paragraph.cpp
+++ b/src/Paragraph.cpp
@@ -1997,7 +1997,7 @@ docstring Paragraph::expandParagraphLabel(Layout const & 
layout,
                        docstring parent(fmt, i + 1, j - i - 1);
                        docstring label = from_ascii("??");
                        if (tclass.hasLayout(parent))
-                               docstring label = 
expandParagraphLabel(tclass[parent], bparams,
+                               label = expandParagraphLabel(tclass[parent], 
bparams,
                                                      process_appendix);
                        fmt = docstring(fmt, 0, i) + label
                                + docstring(fmt, j + 1, docstring::npos);