Merge remote-tracking branch 'qatar/release/0.7' into release/0.8

* qatar/release/0.7:
  matroskadec: Fix a bug where a pointer was cached to an array that might later move due to a realloc()
  vorbis: Avoid some out-of-bounds reads
  vp3: fix oob read for negative tokens and memleaks on error. (cherry picked from commit 8370e426e4)
  avserver: Fix a bug where the socket is IPv4, but IPv6 is autoselected for the loopback address.
  vp3: fix streams with non-zero last coefficient

Merged-by: Michael Niedermayer <michaelni@gmx.at>

ffserver.c

@@ -516,6 +516,7 @@ static int socket_open_listen(struct sockaddr_in *my_addr)
     tmp = 1;
     setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
 
+    my_addr->sin_family = AF_INET;
     if (bind (server_fd, (struct sockaddr *) my_addr, sizeof (*my_addr)) < 0) {
         char bindmsg[32];
         snprintf(bindmsg, sizeof(bindmsg), "bind(port %d)", ntohs(my_addr->sin_port));

libavcodec/vorbis.c

@@ -150,7 +150,7 @@ void ff_vorbis_ready_floor1_list(vorbis_floor1_entry * list, int values)
     }
 }
 
-static inline void render_line_unrolled(intptr_t x, intptr_t y, int x1,
+static inline void render_line_unrolled(intptr_t x, uint8_t y, int x1,
                                         intptr_t sy, int ady, int adx,
                                         float *buf)
 {
@@ -173,7 +173,7 @@ static inline void render_line_unrolled(intptr_t x, intptr_t y, int x1,
     }
 }
 
-static void render_line(int x0, int y0, int x1, int y1, float *buf)
+static void render_line(int x0, uint8_t y0, int x1, int y1, float *buf)
 {
     int dy  = y1 - y0;
     int adx = x1 - x0;
@@ -183,10 +183,10 @@ static void render_line(int x0, int y0, int x1, int y1, float *buf)
     if (ady*2 <= adx) { // optimized common case
         render_line_unrolled(x0, y0, x1, sy, ady, adx, buf);
     } else {
-        int base = dy / adx;
+        int base  = dy / adx;
-        int x    = x0;
+        int x     = x0;
-        int y    = y0;
+        uint8_t y = y0;
-        int err  = -adx;
+        int err   = -adx;
         ady -= FFABS(base) * adx;
         while (++x < x1) {
             y += base;
@@ -204,7 +204,8 @@ void ff_vorbis_floor1_render_list(vorbis_floor1_entry * list, int values,
                                   uint16_t *y_list, int *flag,
                                   int multiplier, float *out, int samples)
 {
-    int lx, ly, i;
+    int lx, i;
+    uint8_t ly;
     lx = 0;
     ly = y_list[0] * multiplier;
     for (i = 1; i < values; i++) {

libavcodec/vp3.c

@@ -1323,6 +1323,8 @@ static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
             return i;
         }
     } while (i < 64);
+    // return value is expected to be a valid level
+    i--;
 end:
     // the actual DC+prediction is in the fragment structure
     block[0] = frag->dc * s->qmat[0][inter][plane][0];

libavformat/matroskadec.c

@@ -1169,7 +1169,6 @@ static void matroska_convert_tags(AVFormatContext *s)
 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
 {
     EbmlList *seekhead_list = &matroska->seekhead;
-    MatroskaSeekhead *seekhead = seekhead_list->elem;
     uint32_t level_up = matroska->level_up;
     int64_t before_pos = avio_tell(matroska->ctx->pb);
     uint32_t saved_id = matroska->current_id;
@@ -1182,6 +1181,7 @@ static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
         return;
 
     for (i=0; i<seekhead_list->nb_elem; i++) {
+        MatroskaSeekhead *seekhead = seekhead_list->elem;
         int64_t offset = seekhead[i].pos + matroska->segment_start;
 
         if (seekhead[i].pos <= before_pos