Fix warnings from clang -Wdocumentation.

src/liblzma/check/check.h

@@ -108,10 +108,6 @@ extern const uint64_t lzma_crc64_table[4][256];
 
 
 /// \brief      Initialize *check depending on type
-///
-/// \return     LZMA_OK on success. LZMA_UNSUPPORTED_CHECK if the type is not
-///             supported by the current version or build of liblzma.
-///             LZMA_PROG_ERROR if type > LZMA_CHECK_ID_MAX.
 extern void lzma_check_init(lzma_check_state *check, lzma_check type);
 
 /// Update the check state

src/liblzma/lz/lz_encoder_mf.c

@@ -242,8 +242,8 @@ do { \
 /// \param      cur_match       Start position of the current match candidate
 /// \param      depth           Maximum length of the hash chain
 /// \param      son             lzma_mf.son (contains the hash chain)
-/// \param      cyclic_pos
+/// \param      cyclic_pos      lzma_mf.cyclic_pos
-/// \param      cyclic_size
+/// \param      cyclic_size     lzma_mf_cyclic_size
 /// \param      matches         Array to hold the matches.
 /// \param      len_best        The length of the longest match found so far.
 static lzma_match *

src/xz/options.c

@@ -49,13 +49,13 @@ typedef struct {
 /// is called, which should update the given value to filter-specific
 /// options structure.
 ///
+/// This returns only if no errors occur.
+///
 /// \param      str     String containing the options from the command line
 /// \param      opts    Filter-specific option map
 /// \param      set     Filter-specific function to update filter_options
 /// \param      filter_options  Pointer to filter-specific options structure
 ///
-/// \return     Returns only if no errors occur.
-///
 static void
 parse_options(const char *str, const option_map *opts,
 		void (*set)(void *filter_options,