Detect "tif" suffix as TIFF.

Patch by Quoc Cuong Pham: Quoc-Cuong D PHAM AT cea D fr


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13557 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/img2.c

@@ -58,6 +58,7 @@ static const IdStrMap img_tags[] = {
     { CODEC_ID_GIF       , "gif"},
     { CODEC_ID_TARGA     , "tga"},
     { CODEC_ID_TIFF      , "tiff"},
+    { CODEC_ID_TIFF      , "tif"},
     { CODEC_ID_SGI       , "sgi"},
     { CODEC_ID_PTX       , "ptx"},
     { CODEC_ID_PCX       , "pcx"},