Fix T102213: Invalid font size in the image editor with some scripts

The size could be left at an unexpected value by scripts, causing
the wrong size to be shown.

Ref D16493

source/blender/editors/screen/area.c

@@ -3531,6 +3531,9 @@ void ED_region_info_draw_multiline(ARegion *region,
   /* background box */
   rcti rect = *ED_region_visible_rect(region);
 
+  /* Needed in case scripts leave the font size at an unexpected value, see: T102213. */
+  BLF_size(fontid, style->widget.points * U.dpi_fac);
+
   /* Box fill entire width or just around text. */
   if (!full_redraw) {
     const char **text = &text_array[0];