JFS: Fix non-ascii file name problem

An unintentional sign extention caused non-ascii characters to be
stored incorrectly, leading to inaccessible files.  Changing a
declaration to unsigned char fixes the problem.

fs/jfs/jfs_unicode.c

@@ -78,7 +78,7 @@ int jfs_strfromUCS_le(char *to, const wchar_t * from,	/* LITTLE ENDIAN */
  * FUNCTION:	Convert character string to unicode string
  *
  */
-static int jfs_strtoUCS(wchar_t * to, const char *from, int len,
+static int jfs_strtoUCS(wchar_t * to, const unsigned char *from, int len,
 		struct nls_table *codepage)
 {
 	int charlen;
@@ -92,8 +92,7 @@ static int jfs_strtoUCS(wchar_t * to, const char *from, int len,
 				jfs_err("jfs_strtoUCS: char2uni returned %d.",
 					charlen);
 				jfs_err("charset = %s, char = 0x%x",
-					codepage->charset,
-					(unsigned char) *from);
+					codepage->charset, *from);
 				return charlen;
 			}
 		}