[LyX/master] Fix bug #9319: Problems with space inside math and textrm.

[Enrico Forestieri]

commit d1858b89d0828c3fe8f4e898f609aaed93333d33
Author: Enrico Forestieri <for...@lyx.org>
Date:   Tue Nov 4 21:36:10 2014 +0100

    Fix bug #9319: Problems with space inside math and textrm.

diff --git a/src/mathed/InsetMathSpace.cpp b/src/mathed/InsetMathSpace.cpp
index f961224..2a3b6f4 100644
--- a/src/mathed/InsetMathSpace.cpp
+++ b/src/mathed/InsetMathSpace.cpp
@@ -273,7 +273,7 @@ void InsetMathSpace::write(WriteStream & os) const
        os << space_info[space_].name.c_str();
        if (space_info[space_].custom)
                os << '{' << length_.asLatexString().c_str() << '}';
-       else if (space_info[space_].escape && space_info[space_].name != " ")
+       else if (space_info[space_].escape && space_info[space_].name.length() 
> 1)
                os.pendingSpace(true);
 }