[PATCH] Memory leak in locale.c set_default_locale

[dualbus]

Found by running the test suite under ASAN.

    =================================================================
    ==3298==ERROR: LeakSanitizer: detected memory leaks
    
    Direct leak of 12 byte(s) in 1 object(s) allocated from:
        #0 0x7f2b94db1d28 in malloc 
(/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc1d28)
        #1 0x558589eb06d6 in xmalloc 
(/home/dualbus/src/gnu/bash-build/bash+0x14f6d6)
        #2 0x558589ea2c62 in set_default_locale 
(/home/dualbus/src/gnu/bash-build/bash+0x141c62)
        #3 0x558589de17f0 in main 
(/home/dualbus/src/gnu/bash-build/bash+0x807f0)
        #4 0x7f2b945442b0 in __libc_start_main 
(/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
    
    SUMMARY: AddressSanitizer: 12 byte(s) leaked in 1 allocation(s).


*** /tmp/R6GbnO_locale.c        2017-06-07 20:40:25.575118629 -0500
--- locale.c    2017-06-07 20:39:59.054419575 -0500
***************
*** 85,91 ****
    textdomain (PACKAGE);
  
    locale_mb_cur_max = MB_CUR_MAX;
!   locale_utf8locale = locale_isutf8 (default_locale);
    locale_shiftstates = mblen ((char *)NULL, 0);
  }
  
--- 85,98 ----
    textdomain (PACKAGE);
  
    locale_mb_cur_max = MB_CUR_MAX;
!   locale_utf8locale = 0;
! #if defined (HAVE_SETLOCALE)
!   if (default_locale)
!     {
!       locale_utf8locale = locale_isutf8 (default_locale);
!       free (default_locale);
!     }
! #endif /* HAVE_SETLOCALE */
    locale_shiftstates = mblen ((char *)NULL, 0);
  }
  
-- 
Eduardo Bustamante
https://dualbus.me/