updated for version 7.4.520

Problem:    Sun PCK locale is not recognzed.
Solution:   Add PCK in the table. (Keiichi Oono)

src/mbyte.c

@@ -405,6 +405,7 @@ enc_alias_table[] =
     {"unix-jis",	IDX_EUC_JP},
     {"ujis",		IDX_EUC_JP},
     {"shift-jis",	IDX_SJIS},
+    {"pck",		IDX_SJIS},	/* Sun: PCK */
     {"euckr",		IDX_EUC_KR},
     {"5601",		IDX_EUC_KR},	/* Sun: KS C 5601 */
     {"euccn",		IDX_EUC_CN},

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    520,
 /**/
     519,
 /**/