Other (pedantic) warnings for possible uninitialized variables.

stb_vorbis.c

@@ -3969,7 +3969,7 @@ static int start_decoder(vorb *f)
             g->sorted_order[j] = (uint8) p[j].id;
          // precompute the neighbors
          for (j=2; j < g->values; ++j) {
-            int low,hi;
+            int low = 0,hi = 0;
             neighbors(g->Xlist, j, &low,&hi);
             g->neighbors[j][0] = low;
             g->neighbors[j][1] = hi;
@@ -4673,7 +4673,7 @@ static int seek_to_sample_coarse(stb_vorbis *f, uint32 sample_number)
    ProbedPage left, right, mid;
    int i, start_seg_with_known_loc, end_pos, page_start;
    uint32 delta, stream_length, padding, last_sample_limit;
-   double offset, bytes_per_sample;
+   double offset = 0.0, bytes_per_sample = 0.0;
    int probe = 0;
 
    // find the last page and validate the target sample
@@ -5225,7 +5225,7 @@ static void convert_samples_short(int buf_c, short **buffer, int b_offset, int d
 
 int stb_vorbis_get_frame_short(stb_vorbis *f, int num_c, short **buffer, int num_samples)
 {
-   float **output;
+   float **output = NULL;
    int len = stb_vorbis_get_frame_float(f, NULL, &output);
    if (len > num_samples) len = num_samples;
    if (len)