minor tweaks to private md5 interface

src/libFLAC/include/private/md5.h

+#ifndef FLAC__PRIVATE__MD5_H
+#define FLAC__PRIVATE__MD5_H
+
 /*
  * This is the header file for the MD5 message-digest algorithm.
  * The algorithm is due to Ron Rivest.  This code was
@@ -20,29 +23,22 @@
  * Still in the public domain.
  *
  * Josh Coalson: made some changes to integrate with libFLAC.
- * Still in the public domain.
+ * Still in the public domain, with no warranty.
  */
 
-#ifndef FLAC__PRIVATE__MD5_H
-#define FLAC__PRIVATE__MD5_H
-
-#define md5byte unsigned char
-
 #include "FLAC/ordinals.h"
 
-struct FLAC__MD5Context {
+typedef struct {
 	FLAC__uint32 buf[4];
 	FLAC__uint32 bytes[2];
 	FLAC__uint32 in[16];
 	FLAC__byte *internal_buf;
 	unsigned capacity;
-};
+} FLAC__MD5Context;
 
-void FLAC__MD5Init(struct FLAC__MD5Context *context);
-void FLAC__MD5Update(struct FLAC__MD5Context *context, md5byte const *buf, unsigned len);
-void FLAC__MD5Final(md5byte digest[16], struct FLAC__MD5Context *context);
-void FLAC__MD5Transform(FLAC__uint32 buf[4], FLAC__uint32 const in[16]);
+void FLAC__MD5Init(FLAC__MD5Context *context);
+void FLAC__MD5Final(FLAC__byte digest[16], FLAC__MD5Context *context);
 
-FLAC__bool FLAC__MD5Accumulate(struct FLAC__MD5Context *ctx, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample);
+FLAC__bool FLAC__MD5Accumulate(FLAC__MD5Context *ctx, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample);
 
-#endif /* !MD5_H */
+#endif

src/libFLAC/stream_decoder.c

@@ -192,7 +192,7 @@ typedef struct FLAC__StreamDecoderPrivate {
 	FLAC__bool do_md5_checking; /* initially gets protected_->md5_checking but is turned off after a seek or if the metadata has a zero MD5 */
 	FLAC__bool internal_reset_hack; /* used only during init() so we can call reset to set up the decoder without rewinding the input */
 	FLAC__bool is_seeking;
-	struct FLAC__MD5Context md5context;
+	FLAC__MD5Context md5context;
 	FLAC__byte computed_md5sum[16]; /* this is the sum we computed from the decoded data */
 	/* (the rest of these are only used for seeking) */
 	FLAC__Frame last_frame; /* holds the info of the last frame we seeked to */

src/libFLAC/stream_encoder.c

@@ -361,7 +361,7 @@ typedef struct FLAC__StreamEncoderPrivate {
 	FLAC__StreamMetadata_SeekTable *seek_table;       /* pointer into encoder->protected_->metadata_ where the seek table is */
 	unsigned current_sample_number;
 	unsigned current_frame_number;
-	struct FLAC__MD5Context md5context;
+	FLAC__MD5Context md5context;
 	FLAC__CPUInfo cpuinfo;
 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 	unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);