make \newcommand{\bb}[1]{\mathbf{#1}} work for read/write/display.

[lyx.git] / src / mathed / math_data.h

diff --git a/src/mathed/math_data.h b/src/mathed/math_data.h
index 373396bbdb8bbb74d398bf3a6e9409c9450fb87f..2e029e2aa195ca0e8a44a74c902e911f35ffa9d3 100644 (file)
--- a/src/mathed/math_data.h
+++ b/src/mathed/math_data.h
@@ -51,6 +51,8 @@ public:
        ///
        typedef buffer_type::size_type       size_type;
        ///
+       typedef buffer_type::difference_type difference_type;
+       ///
        typedef buffer_type::size_type       idx_type;
        ///
        typedef buffer_type::size_type       pos_type;