dvbsub: remove unused variable

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/dvbsub.c

@@ -199,7 +199,7 @@ static void dvb_encode_rle8(uint8_t **pq,
                             int w, int h)
 {
     uint8_t *q;
-    int x, y, len, x1, f, color;
+    int x, y, len, x1, color;
 
     q = *pq;
 
@@ -207,7 +207,6 @@ static void dvb_encode_rle8(uint8_t **pq,
         *q++ = 0x12;
 
         x = 0;
-        f = 0;
         while (x < w) {
             x1 = x;
             color = bitmap[x1++];