Fix compilation

Compile fix for [b0b8e5f5/lyxgit].

diff --git a/src/mathed/MathSupport.h b/src/mathed/MathSupport.h
index 2e0ccff38c4ca3d6c8edb6843958a41dc52cad92..968be725ef305ae101d8e100c0c5774004faef10 100644 (file)
--- a/src/mathed/MathSupport.h
+++ b/src/mathed/MathSupport.h
@@ -19,6 +19,7 @@
 
 namespace lyx {
 
+class MetricsInfo;
 class PainterInfo;
 class FontInfo;
 class Dimension;