Replace _Pragma with #pragma

Co-authored-by: Frank Dana <[email protected]>

Author: jonoomph

src/FFmpegWriter.cpp

@@ -1223,11 +1223,11 @@ AVStream *FFmpegWriter::add_video_stream() {
 	st->time_base.num = info.video_timebase.num;
 	st->time_base.den = info.video_timebase.den;
 #if (LIBAVFORMAT_VERSION_MAJOR >= 58)
-	_Pragma ("GCC diagnostic push");
-	_Pragma ("GCC diagnostic ignored \"-Wdeprecated-declarations\""); \
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 	st->codec->time_base.num = info.video_timebase.num;
 	st->codec->time_base.den = info.video_timebase.den;
-	_Pragma ("GCC diagnostic pop");
+	#pragma GCC diagnostic pop
 #endif
 
 	c->gop_size = 12; /* TODO: add this to "info"... emit one intra frame every twelve frames at most */