movenc: Merge if statements

This isn't exactly equivalent with the earlier code for codecs
other than H264 and VC1, but those are two only codecs supported
by this codepath anyway, and it simplifies it a bit.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/movenc.c

@@ -2147,14 +2147,11 @@ static int mov_write_isml_manifest(AVIOContext *pb, MOVMuxContext *mov)
                                     size);
                     av_free(ptr);
                 }
-            } else {
-                param_write_hex(pb, "CodecPrivateData", track->enc->extradata,
-                                track->enc->extradata_size);
-            }
-            if (track->enc->codec_id == CODEC_ID_H264) {
                 param_write_string(pb, "FourCC", "H264");
             } else if (track->enc->codec_id == CODEC_ID_VC1) {
                 param_write_string(pb, "FourCC", "WVC1");
+                param_write_hex(pb, "CodecPrivateData", track->enc->extradata,
+                                track->enc->extradata_size);
             }
             param_write_int(pb, "MaxWidth", track->enc->width);
             param_write_int(pb, "MaxHeight", track->enc->height);