[LyX/master] Fix regression of 6dfc25508

[Georg Baum]

commit 0f2dc7d0a74d2788d365489c4558c22ce35255c2
Author: Georg Baum <b...@lyx.org>
Date:   Sun Jul 3 19:41:04 2016 +0200

    Fix regression of 6dfc25508
    
    We need to remove the temp file now manually.
---
 src/mathed/MathExtern.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/mathed/MathExtern.cpp b/src/mathed/MathExtern.cpp
index 8b1e0f0..ee2004b 100644
--- a/src/mathed/MathExtern.cpp
+++ b/src/mathed/MathExtern.cpp
@@ -1021,6 +1021,7 @@ namespace {
                lyxerr << "calling: " << cmd
                       << "\ninput: '" << data << "'" << endl;
                cmd_ret const ret = runCommand(command);
+               cas_tmpfile.removeFile();
                return ret.second;
        }