avdevice/decklink_enc: use 64bit format string for BMD timebase instead of long long

BMDTimeValue is defined as LONGLONG on Windows, but int64_t on Linux/Mac.

Fixes format string warnings:

libavdevice/decklink_enc.cpp: In function ‘void construct_cc(AVFormatContext*, decklink_ctx*, AVPacket*, klvanc_line_set_s*)’:
libavdevice/decklink_enc.cpp:424:48: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 4 has type ‘BMDTimeValue {aka long int}’ [-Wformat=]
                ctx->bmd_tb_num, ctx->bmd_tb_den);
                ~~~~~~~~~~~~~~~                 ^
libavdevice/decklink_enc.cpp:424:48: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 5 has type ‘BMDTimeValue {aka long int}’ [-Wformat=]

Signed-off-by: Marton Balint <cus@passwd.hu>

libavdevice/decklink_enc.cpp

@@ -420,7 +420,7 @@ static void construct_cc(AVFormatContext *avctx, struct decklink_ctx *ctx,
 
     ret = klvanc_set_framerate_EIA_708B(cdp, ctx->bmd_tb_num, ctx->bmd_tb_den);
     if (ret) {
-        av_log(avctx, AV_LOG_ERROR, "Invalid framerate specified: %lld/%lld\n",
+        av_log(avctx, AV_LOG_ERROR, "Invalid framerate specified: %" PRId64 "/%" PRId64 "\n",
                ctx->bmd_tb_num, ctx->bmd_tb_den);
         klvanc_destroy_eia708_cdp(cdp);
         return;