TFT examples updated.

src/libgpanel/circle.c

@@ -30,7 +30,7 @@ void gpanel_circle(int color, int x, int y, int radius)
 
     param.color = color;
     param.x = x;
-    param.y = x;
+    param.y = y;
     param.radius = radius;
     ioctl(_gpanel_fd, GPANEL_CIRCLE, &param);
 }

src/libgpanel/image.c

@@ -29,7 +29,7 @@ void gpanel_image(int x, int y, int width, int height, const unsigned short *dat
     struct gpanel_image_t param;
 
     param.x = x;
-    param.y = x;
+    param.y = y;
     param.width = width;
     param.height = height;
     param.image = data;

src/libgpanel/pixel.c

@@ -30,6 +30,6 @@ void gpanel_pixel(int color, int x, int y)
 
     param.color = color;
     param.x = x;
-    param.y = x;
+    param.y = y;
     ioctl(_gpanel_fd, GPANEL_PIXEL, &param);
 }