[LyX/master] Fix coverity issue #127197.

[Richard Heck]

commit a48adfa6d6b349f15c27e852e1c72a4f4c00880c
Author: Richard Heck <rgh...@lyx.org>
Date:   Sun Jun 12 00:26:38 2016 -0400

    Fix coverity issue #127197.
    
    We may fail to get a buffer when we request one.

diff --git a/src/LyX.cpp b/src/LyX.cpp
index b7b1edf..66ff6f3 100644
--- a/src/LyX.cpp
+++ b/src/LyX.cpp
@@ -490,14 +490,15 @@ int LyX::execWithoutGui(int & argc, char * argv[])
 
                Buffer * buf = 
pimpl_->buffer_list_.newBuffer(fname.absFileName());
                LYXERR(Debug::FILES, "Loading " << fname);
-               if (buf->loadLyXFile() == Buffer::ReadSuccess) {
+               if (buf && buf->loadLyXFile() == Buffer::ReadSuccess) {
                        ErrorList const & el = buf->errorList("Parse");
                        if (!el.empty())
                                        for_each(el.begin(), el.end(),
                                                                         
bind(&LyX::printError, this, _1));
                        command_line_buffers.push_back(buf);
                } else {
-                       pimpl_->buffer_list_.release(buf);
+                       if (buf)
+                               pimpl_->buffer_list_.release(buf);
                        docstring const error_message =
                                        bformat(_("LyX failed to load the 
following file: %1$s"),
                                                                        
from_utf8(fname.absFileName()));