Asan fix warning for 1-bit vert

1-bit vertical displays overread the buffer due to the way the
packing works, this isn't the hottest path anyway but
we can check if height <= 8 and make stride 0 so the dummy data
gets the beginning of the data instead

Change-Id: I88ab4dc37bfd2d680d125f964beafe0ddfb00645

firmware/drivers/lcd-1bit-vert.c

@@ -402,6 +402,9 @@ void ICODE_ATTR LCDFN(bitmap_part)(const unsigned char *src, int src_x,
     }
     else
     {
+        if (height <= 8)
+            stride = 0; /* ASAN fix keep from reading beyond buffer */
+
         dst_end = dst + width;
         do
         {