avcodec/imc: Fix leak on init error

Since e6afa61be9 an AVFloatDSPContext
would leak on av_tx_init() failure.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/imc.c

@@ -1038,6 +1038,7 @@ const FFCodec ff_imc_decoder = {
     .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
     .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif
 #if CONFIG_IAC_DECODER
@@ -1054,5 +1055,6 @@ const FFCodec ff_iac_decoder = {
     .p.capabilities = AV_CODEC_CAP_DR1,
     .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };
 #endif