lavf/avs2dec.c: optimize code style

Signed-off-by: hwren <hwrenx@126.com>

libavformat/avs2dec.c

@@ -33,9 +33,9 @@
 
 static int avs2_probe(const AVProbeData *p)
 {
-    uint32_t code= -1, hds=0, pic=0, seq=0;
-    uint8_t state=0;
-    const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size, *sqb=0;
+    uint32_t code = -1, hds = 0, pic = 0, seq = 0;
+    uint8_t state = 0;
+    const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size, *sqb = 0;
     if (AV_RB32(p->buf) != 0x1B0){
         return 0;
     }