[LyX/master] Make the while loop actually loop

[Jean-Marc]

commit f74de776ef813cfddb414edacd283690d613cd7e
Author: Jean-Marc <lasgout...@lyx.org>
Date:   Sat Sep 12 19:14:27 2015 +0200

    Make the while loop actually loop
    
    Coverity issue 23513.

diff --git a/src/mathed/MathExtern.cpp b/src/mathed/MathExtern.cpp
index a943dac..1904843 100644
--- a/src/mathed/MathExtern.cpp
+++ b/src/mathed/MathExtern.cpp
@@ -1119,7 +1119,6 @@ namespace {
                                + out.substr(k + 1);
                        //lyxerr << "output: " << out << endl;
                        i = out.find("\\mathchoice", i);
-                       break;
                }
 
                i = out.find("\\over");