avcodec/wma(dec|enc): Fix memleaks upon allocation error

ff_wma_init() can fail without freeing everything it has allocated;
so add the FF_CODEC_CAP_INIT_CLEANUP to the codecs using it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/wmadec.c

@@ -977,6 +977,7 @@ const AVCodec ff_wmav1_decoder = {
     .capabilities   = AV_CODEC_CAP_DR1,
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif
 #if CONFIG_WMAV2_DECODER
@@ -993,5 +994,6 @@ const AVCodec ff_wmav2_decoder = {
     .capabilities   = AV_CODEC_CAP_DR1,
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif

libavcodec/wmaenc.c

@@ -436,6 +436,7 @@ const AVCodec ff_wmav1_encoder = {
     .close          = ff_wma_end,
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif
 #if CONFIG_WMAV2_ENCODER
@@ -450,5 +451,6 @@ const AVCodec ff_wmav2_encoder = {
     .close          = ff_wma_end,
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif