fix "param"s that should be "@param"

Actual command: sed -i -e "s/\(^ *\\* \)\(param[^a-z]\)/\1@\2/" $( git grep -l "^ *\\* param[^a-z]" )
Signed-off-by: Andrew Sayers <ffmpeg-devel@pileofstuff.org>

libavcodec/evrcdec.c

@@ -495,11 +495,11 @@ static void fcb_excitation(EVRCContext *e, const uint16_t *codebook,
 /**
  * Synthesis of the decoder output signal.
  *
- * param[in]     in              input signal
- * param[in]     filter_coeffs   LPC coefficients
- * param[in/out] memory          synthesis filter memory
- * param         buffer_length   amount of data to process
- * param[out]    samples         output samples
+ * @param[in]     in              input signal
+ * @param[in]     filter_coeffs   LPC coefficients
+ * @param[in/out] memory          synthesis filter memory
+ * @param         buffer_length   amount of data to process
+ * @param[out]    samples         output samples
  *
  * TIA/IS-127 5.2.3.15, 5.7.3.4
  */

libavutil/bprint.h

@@ -172,9 +172,9 @@ void av_bprint_chars(AVBPrint *buf, char c, unsigned n);
 /**
  * Append data to a print buffer.
  *
- * param buf  bprint buffer to use
- * param data pointer to data
- * param size size of data
+ * @param buf  bprint buffer to use
+ * @param data pointer to data
+ * @param size size of data
  */
 void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size);
 
@@ -182,9 +182,9 @@ struct tm;
 /**
  * Append a formatted date and time to a print buffer.
  *
- * param buf  bprint buffer to use
- * param fmt  date and time format string, see strftime()
- * param tm   broken-down time structure to translate
+ * @param buf  bprint buffer to use
+ * @param fmt  date and time format string, see strftime()
+ * @param tm   broken-down time structure to translate
  *
  * @note due to poor design of the standard strftime function, it may
  * produce poor results if the format string expands to a very long text and