TIFF support

src/const.h

@@ -153,6 +153,7 @@ enum FILE_FORMATS
   FORMAT_FLI,  ///< Autodesk Animator FLI/FLC
   FORMAT_MOTO, ///< Thomson MO/TO computers pictures
   FORMAT_HGR,  ///< Apple II HGR and DHGR
+  FORMAT_TIFF, ///< Tagged Image File Format
   FORMAT_MISC, ///< Must be last of enum: others formats recognized by SDL_image (or recoil)
   FORMAT_CLIPBOARD  ///< To load/save from/to Clipboard
 };