fixed copy

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@1535 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/jpeg.c

@@ -125,11 +125,11 @@ static int jpeg_read(ByteIOContext *f,
             switch(c->pix_fmt) {
             default:
             case PIX_FMT_YUV420P:
-                w >>= 1;
-                h >>= 1;
+                w = (w + 1) >> 1;
+                h = (h + 1) >> 1;
                 break;
             case PIX_FMT_YUV422P:
-                w >>= 1;
+                w = (w + 1) >> 1;
                 break;
             case PIX_FMT_YUV444P:
                 break;