replace assert.h with cassert

The former was deprecated with C++14.

According to the C++11 and C++17 standards, both files are identical.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/decoder/plugins/AdPlugDecoderPlugin.cxx

@@ -29,7 +29,7 @@
 #include <adplug/adplug.h>
 #include <adplug/emuopl.h>
 
-#include <assert.h>
+#include <cassert>
 
 static constexpr Domain adplug_domain("adplug");
 

src/decoder/plugins/AudiofileDecoderPlugin.cxx

@@ -29,9 +29,9 @@
 #include <audiofile.h>
 #include <af_vfs.h>
 
+#include <cassert>
 #include <exception>
 
-#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 

src/decoder/plugins/FaadDecoderPlugin.cxx

@@ -30,9 +30,9 @@
 
 #include <neaacdec.h>
 
+#include <cassert>
 #include <cmath>
 
-#include <assert.h>
 #include <string.h>
 
 static const unsigned adts_sample_rates[] =

src/decoder/plugins/FfmpegDecoderPlugin.cxx

@@ -52,7 +52,8 @@ extern "C" {
 #include <libavutil/frame.h>
 }
 
-#include <assert.h>
+#include <cassert>
+
 #include <string.h>
 
 /**

src/decoder/plugins/FlacPcm.cxx

@@ -23,7 +23,7 @@
 #include "util/RuntimeError.hxx"
 #include "util/ConstBuffer.hxx"
 
-#include <assert.h>
+#include <cassert>
 
 void
 FlacPcmImport::Open(unsigned sample_rate, unsigned bits_per_sample,

src/decoder/plugins/FlacStreamDecoder.hxx

@@ -22,10 +22,9 @@
 
 #include <FLAC/stream_decoder.h>
 
-#include <utility>
+#include <cassert>
 #include <stdexcept>
-
-#include <assert.h>
+#include <utility>
 
 /**
  * OO wrapper for a FLAC__StreamDecoder.

src/decoder/plugins/GmeDecoderPlugin.cxx

@@ -37,7 +37,8 @@
 
 #include <gme/gme.h>
 
-#include <assert.h>
+#include <cassert>
+
 #include <stdlib.h>
 #include <string.h>
 

src/decoder/plugins/MadDecoderPlugin.cxx

@@ -39,7 +39,8 @@
 #include <id3tag.h>
 #endif
 
-#include <assert.h>
+#include <cassert>
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>

src/decoder/plugins/MikmodDecoderPlugin.cxx

@@ -29,7 +29,7 @@
 
 #include <mikmod.h>
 
-#include <assert.h>
+#include <cassert>
 
 static constexpr Domain mikmod_domain("mikmod");
 

src/decoder/plugins/ModplugDecoderPlugin.cxx

@@ -29,8 +29,7 @@
 
 #include <libmodplug/modplug.h>
 
-
-#include <assert.h>
+#include <cassert>
 
 static constexpr Domain modplug_domain("modplug");
 

src/decoder/plugins/WavpackDecoderPlugin.cxx

@@ -31,13 +31,11 @@
 #include <wavpack/wavpack.h>
 
 #include <algorithm>
+#include <cassert>
+#include <cstdlib>
 #include <iterator>
 #include <memory>
 
-#include <cstdlib>
-
-#include <assert.h>
-
 #define ERRORLEN 80
 
 #ifdef OPEN_DSD_AS_PCM