[LyX/master] fix GIT - version control for LyX documents not detected

[Stephan Witt]

commit faef2f93dd62f308adbd08597be1f568eb2c9cc2
Author: Stephan Witt <sw...@lyx.org>
Date:   Sun Jan 17 08:03:25 2016 +0100

    fix GIT - version control for LyX documents not detected

diff --git a/src/VCBackend.cpp b/src/VCBackend.cpp
index 6a6ea08..6350766 100644
--- a/src/VCBackend.cpp
+++ b/src/VCBackend.cpp
@@ -495,6 +495,7 @@ bool RCS::prepareFileRevision(string const &revis, string & 
f)
                      + quoteName(onlyFileName(owner_->absFileName()))
                      + " > " + quoteName(tmpf.toFilesystemEncoding()),
                FileName(owner_->filePath()));
+       tmpf.refresh();
        if (tmpf.isFileEmpty())
                return false;
 
@@ -1119,6 +1120,7 @@ bool CVS::prepareFileRevision(string const & revis, 
string & f)
        doVCCommandWithOutput("cvs update -p -r" + rev + ' '
                + getTarget(File),
                FileName(owner_->filePath()), tmpf);
+       tmpf.refresh();
        if (tmpf.isFileEmpty())
                return false;
 
@@ -1784,6 +1786,7 @@ bool SVN::prepareFileRevision(string const & revis, 
string & f)
                      + quoteName(onlyFileName(owner_->absFileName()))
                      + " > " + quoteName(tmpf.toFilesystemEncoding()),
                FileName(owner_->filePath()));
+       tmpf.refresh();
        if (tmpf.isFileEmpty())
                return false;
 
@@ -1843,6 +1846,7 @@ FileName const GIT::findFile(FileName const & file)
                        quoteName(fname) + " > " +
                        quoteName(tmpf.toFilesystemEncoding()),
                        file.onlyPath());
+       tmpf.refresh();
        bool found = !tmpf.isFileEmpty();
        LYXERR(Debug::LYXVC, "GIT control: " << (found ? "enabled" : 
"disabled"));
        return found ? file : FileName();
@@ -2233,6 +2237,7 @@ bool GIT::prepareFileRevision(string const & revis, 
string & f)
                      + quoteName(onlyFileName(owner_->absFileName()))
                      + " > " + quoteName(tmpf.toFilesystemEncoding()),
                FileName(owner_->filePath()));
+       tmpf.refresh();
        if (tmpf.isFileEmpty())
                return false;