bgmc: check the correct pointers

Fixes CID90539, CID90538
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/bgmc.c

@@ -461,7 +461,7 @@ int ff_bgmc_init(AVCodecContext *avctx, uint8_t **cf_lut, int **cf_lut_status)
     *cf_lut        = av_malloc(sizeof(**cf_lut)        * LUT_BUFF * 16 * LUT_SIZE);
     *cf_lut_status = av_malloc(sizeof(**cf_lut_status) * LUT_BUFF);
 
-    if (!cf_lut || !cf_lut_status) {
+    if (!*cf_lut || !*cf_lut_status) {
         ff_bgmc_end(cf_lut, cf_lut_status);
         av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
         return AVERROR(ENOMEM);