vt: Don't assume char is signed (next sdcc will change this, 6502 isnt)

diff --git a/Kernel/vt.c b/Kernel/vt.c
index 541b1c0..be17c30 100644 (file)
--- a/Kernel/vt.c
+++ b/Kernel/vt.c
@@ -39,8 +39,8 @@
 
 
 static int vtmode;
-static char cursorx;
-static char cursory;
+static signed char cursorx;
+static signed char cursory;
 static int ncursory;
 
 static void cursor_fix(void)