Switch to C99 types (retaining compat with old compilers)

Seeing the "mpd_" prefix _everywhere_ is mind-numbing as the
mind needs to retrain itself to skip over the first 4 tokens of
a type to get to its meaning.  So avoid having extra characters
on my terminal to make it easier to follow code at 2:30 am in
the morning.

Please report any new issues you may come across on Free
toolchains.  I realize how difficult it can be to build/maintain
cross-compiling toolchains and I have no intention of forcing
people to upgrade their toolchains to build mpd.

Tested with gcc 2.95.4 and and gcc 4.3.1 on x86-32.

src/inputPlugins/aac_plugin.c

@@ -316,7 +316,7 @@ static int aac_stream_decode(struct decoder * mpd_decoder,
 	unsigned int sampleCount;
 	char *sampleBuffer;
 	size_t sampleBufferLen;
-	mpd_uint16 bitRate = 0;
+	uint16_t bitRate = 0;
 	AacBuffer b;
 	int initialized = 0;
 
@@ -453,7 +453,7 @@ static int aac_decode(struct decoder * mpd_decoder, char *path)
 	/*float * seekTable;
 	   long seekTableEnd = -1;
 	   int seekPositionFound = 0; */
-	mpd_uint16 bitRate = 0;
+	uint16_t bitRate = 0;
 	AacBuffer b;
 	InputStream inStream;
 	int initialized = 0;

src/inputPlugins/mp3_plugin.c

@@ -65,7 +65,7 @@ static unsigned long prng(unsigned long state)
 	return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL;
 }
 
-static mpd_sint16 audio_linear_dither(unsigned int bits, mad_fixed_t sample,
+static int16_t audio_linear_dither(unsigned int bits, mad_fixed_t sample,
 				      struct audio_dither *dither)
 {
 	unsigned int scalebits;
@@ -107,15 +107,15 @@ static mpd_sint16 audio_linear_dither(unsigned int bits, mad_fixed_t sample,
 
 	dither->error[0] = sample - output;
 
-	return (mpd_sint16)(output >> scalebits);
+	return (int16_t)(output >> scalebits);
 }
 
-static unsigned dither_buffer(mpd_sint16 *dest0, const struct mad_synth *synth,
+static unsigned dither_buffer(int16_t *dest0, const struct mad_synth *synth,
 			      struct audio_dither *dither,
 			      unsigned int start, unsigned int end,
 			      unsigned int num_channels)
 {
-	mpd_sint16 *dest = dest0;
+	int16_t *dest = dest0;
 	unsigned int i;
 
 	for (i = start; i < end; ++i) {
@@ -153,7 +153,7 @@ typedef struct _mp3DecodeData {
 	struct mad_synth synth;
 	mad_timer_t timer;
 	unsigned char readBuffer[READ_BUFFER_SIZE];
-	mpd_sint16 outputBuffer[MP3_DATA_OUTPUT_BUFFER_SIZE];
+	int16_t outputBuffer[MP3_DATA_OUTPUT_BUFFER_SIZE];
 	float totalTime;
 	float elapsedTime;
 	enum muteframe muteFrame;

src/inputPlugins/mp4_plugin.c

@@ -104,7 +104,7 @@ static int mp4_decode(struct decoder * mpd_decoder, InputStream * inStream)
 	long seekTableEnd = -1;
 	int seekPositionFound = 0;
 	long offset;
-	mpd_uint16 bitRate = 0;
+	uint16_t bitRate = 0;
 	int seeking = 0;
 	double seek_where = 0;
 	int initialized = 0;