Handle memory allocation failures during initialization

Signed-off-by: Tristan Matthews <tmatth@videolan.org>

libspeexdsp/resample.c

@@ -792,6 +792,12 @@ EXPORT SpeexResamplerState *speex_resampler_init_frac(spx_uint32_t nb_channels,
       return NULL;
    }
    st = (SpeexResamplerState *)speex_alloc(sizeof(SpeexResamplerState));
+   if (!st)
+   {
+      if (err)
+         *err = RESAMPLER_ERR_ALLOC_FAILED;
+      return NULL;
+   }
    st->initialised = 0;
    st->started = 0;
    st->in_rate = 0;
@@ -813,9 +819,12 @@ EXPORT SpeexResamplerState *speex_resampler_init_frac(spx_uint32_t nb_channels,
    st->buffer_size = 160;
 
    /* Per channel data */
-   st->last_sample = (spx_int32_t*)speex_alloc(nb_channels*sizeof(spx_int32_t));
-   st->magic_samples = (spx_uint32_t*)speex_alloc(nb_channels*sizeof(spx_uint32_t));
-   st->samp_frac_num = (spx_uint32_t*)speex_alloc(nb_channels*sizeof(spx_uint32_t));
+   if (!(st->last_sample = (spx_int32_t*)speex_alloc(nb_channels*sizeof(spx_int32_t))))
+      goto fail;
+   if (!(st->magic_samples = (spx_uint32_t*)speex_alloc(nb_channels*sizeof(spx_uint32_t))))
+      goto fail;
+   if (!(st->samp_frac_num = (spx_uint32_t*)speex_alloc(nb_channels*sizeof(spx_uint32_t))))
+      goto fail;
    for (i=0;i<nb_channels;i++)
    {
       st->last_sample[i] = 0;
@@ -838,6 +847,12 @@ EXPORT SpeexResamplerState *speex_resampler_init_frac(spx_uint32_t nb_channels,
       *err = filter_err;
 
    return st;
+
+fail:
+   if (err)
+      *err = RESAMPLER_ERR_ALLOC_FAILED;
+   speex_resampler_destroy(st);
+   return NULL;
 }
 
 EXPORT void speex_resampler_destroy(SpeexResamplerState *st)