Fixed a compiler warning.
diff --git a/demos/src/ttdebug.c b/demos/src/ttdebug.c
index dc4a70a..5239a82 100644
--- a/demos/src/ttdebug.c
+++ b/demos/src/ttdebug.c
@@ -811,7 +811,7 @@ TT_CodeRange_Tag debug_coderange = tt_coderange_glyph;
{
FT_Int A, diff, key;
FT_Long next_IP;
- FT_Char ch, oldch, *temp;
+ FT_Char ch, oldch = '\0', *temp;
TT_Error error = 0;