[Bug 49494] New: Branching on uninitialized variables in unix_to_win_locale.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49494

Bug ID: 49494
           Summary: Branching on uninitialized variables in
                    unix_to_win_locale.
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 67621
  --> https://bugs.winehq.org/attachment.cgi?id=67621
Configure output.

This is a very recent problem, introduced in b6722aa752

Steps to reproduce:

* Build wine b6722aa752 (my configure output is attached)
* Build 'int main() { return 0; }' using i686-w64-mingw-gcc
* Run under valgrind (valgrind output attached)

Valgrind emits many warnings such as this:

==17065== Conditional jump or move depends on uninitialised value(s)
==17065==    at 0x403C51E: strpbrk (vg_replace_strmem.c:1689)
==17065==    by 0x4839781: unix_to_win_locale (env.c:664)
==17065==    by 0x4839956: init_locale (env.c:716)
==17065==    by 0x48399A2: init_environment (env.c:780)
==17065==    by 0x484B4BB: __wine_main (loader.c:1825)
==17065==    by 0x7C0018E4: main (main.c:285)