Crash on multiple tests for sparc64 platform

[abelcheung]

Multiple tests were failing on SPARC64 arch. All of them seems to point to path conversion failure in ucs2_strnlen():

Reading symbols from rifiuti-vista...
(gdb) set args ../test/samples/dir-sample1
(gdb) run
Starting program: /home/debian/rifiuti2/src/rifiuti-vista ../test/samples/dir-sample1

Program received signal SIGBUS, Bus error.
0x00000100000050c8 in ucs2_strnlen (str=0x10000208887, max_sz=260) at utils.c:429
429              for (i=0; (i<max_sz) && str[i]; i++) {}
(gdb) bt full
#0  0x00000100000050c8 in ucs2_strnlen (str=0x10000208887, max_sz=260) at utils.c:429
        i = 0
#1  0x00000100000057dc in conv_path_to_utf8_with_tmpl (path=0x10000208887 "C", from_enc=0x0, tmpl=0x10000008530 "<\\u%04X>",
    read=0x7feffffee10, st=0x10000200ee0 <exit_status>) at utils.c:552
        u8_path = 0x6542b679 <error: Cannot access memory at address 0x6542b679>
        i_ptr = 0x1 <error: Cannot access memory at address 0x1>
        o_ptr = 0x2 <error: Cannot access memory at address 0x2>
        result = 0x0
        len = 8791798050296
        r_total = 172000000
        rbyte = 22517998136852480
        wbyte = 0
        status = 336
        in_ch_width = 2
        out_ch_width = 8
        conv = 0x1000000347c <populate_record_data+744>
        __func__ = "conv_path_to_utf8_with_tmpl"
#2  0x0000010000003540 in populate_record_data (buf=0x10000208870, version=1, pathlen=260, erraneous=1) at rifiuti-vista.c:198
        record = 0x1000020ad20
        read = 8791798050488
        __func__ = "populate_record_data"
#3  0x00000100000037fc in parse_record_cb (index_file=0x10000208130 "../test/samples/dir-sample1/$IYAR1YY.exe",
    recordlist=0x7fefffff0b0) at rifiuti-vista.c:252
        record = 0x1000020a940
        basename = 0x1000020abc0 "$IYAR1YY.exe"
        version = 1
        pathlen = 260
        bufsize = 543
        buf = 0x10000208870
        validate_st = R2_OK
        __func__ = "parse_record_cb"
#4  0xfffff80100389790 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) p str
$1 = (const gunichar2 *) 0x10000208887
(gdb) p sizeof(str)
$2 = 8

Most likely the string was treated as (char *) so it was truncated early, and fails conversion to (gunichar *) later.

This is very likely the reason the relavant Debian package stays at 0.6.1, not upgrading to 0.7.0.