add "extern codegen_t GD_CodeGen;" in case no freetype installed.

diff --git a/lib/common/fontmetrics.c b/lib/common/fontmetrics.c
index 5041cafb778747a9d16c4e87e1b3a14de66ca6d9..9a3a21681e8239aa697b59579220c15984892668 100644 (file)
--- a/lib/common/fontmetrics.c
+++ b/lib/common/fontmetrics.c
@@ -137,6 +137,8 @@ void initDPI(graph_t * g)
     _dpi = GD_drawing(g)->dpi;
 }
 
+extern codegen_t GD_CodeGen;
+
 double textheight(int nlines, double fontsz)
 {
     if (Output_codegen == &GD_CodeGen) {