gterm: Fix typo on IMAGE_STRETCHED
diff --git a/stage23/lib/gterm.c b/stage23/lib/gterm.c
index c15b71a2..6db8bd5e 100644
--- a/stage23/lib/gterm.c
+++ b/stage23/lib/gterm.c
@@ -156,7 +156,7 @@ __attribute__((always_inline)) static inline void genloop(int xstart, int xend,
// so you can set x = xstart * ratio, and increment by ratio at each iteration
case IMAGE_STRETCHED:
for (int y = ystart; y < yend; y++) {
- int img_y = y * img_width / gterm_width; // calculate Y with full precision
+ int img_y = (y * img_height) / gterm_height; // calculate Y with full precision
int off = img_pitch * (img_height - 1 - img_y);
int canvas_off = gterm_width * y, fb_off = gterm_pitch / 4 * y;
