Save cursor position in terminal reset

After terminal reset saved terminal position is reset to 0, allowing know
where cursor will go in next restore cursor operation.
---
 st.c |    2 ++
 1 file changed, 2 insertions(+)

st.c

@@ -1076,6 +1076,8 @@ treset(void) {
 	term.mode = MODE_WRAP;
 
 	tclearregion(0, 0, term.col-1, term.row-1);
+	tmoveto(0, 0);
+	tcursor(CURSOR_SAVE);
 }
 
 void