[LyX/master] Disable unicode math symbol replacement.

[Georg Baum]

commit 23752e6114aab1d88b60fa59620d4100eeb94e9b
Author: Georg Baum <b...@lyx.org>
Date:   Sun Mar 9 10:56:05 2014 +0100

    Disable unicode math symbol replacement.
    
    This seems to work only in some cases, so better display the symbol in ERT.

diff --git a/src/mathed/MathFactory.cpp b/src/mathed/MathFactory.cpp
index 961e70e..274acd9 100644
--- a/src/mathed/MathFactory.cpp
+++ b/src/mathed/MathFactory.cpp
@@ -120,6 +120,8 @@ bool canBeDisplayed(char_type c)
 
 bool isUnicodeSymbolAvailable(docstring const & name, char_type & c)
 {
+       // this is too fragile, e.g. prodes W instead of capital omega on OS X
+#if 0
        docstring cmd(from_ascii("\\") + name);
        bool is_combining;
        bool termination;
@@ -133,6 +135,7 @@ bool isUnicodeSymbolAvailable(docstring const & name, 
char_type & c)
                                                is_combining, termination);
        }
        return c != 0 && !is_combining;
+#endif
 }