fix link errors on MacOS X

[Bruno Haible]

On MacOS X 10.3 / PowerPC, variables that are implicitly zero-initialized
can lead to link errors:

$ gcc  -g -O2   -o test-mbsnrtowcs test-mbsnrtowcs.o ../gllib/libgnu.a 
ld: Undefined symbols:
__gl_mbsrtowcs_state

This fixes it:


2009-01-25  Bruno Haible  <address@hidden>

        Avoid link errors on MacOS X 10.3.
        * lib/mbsrtowcs-state.c (_gl_mbsrtowcs_state): Add initializer.
        * lib/wcsrtombs-state.c (_gl_wcsrtombs_state): Likewise.

--- lib/mbsrtowcs-state.c.orig  2009-01-26 03:01:36.000000000 +0100
+++ lib/mbsrtowcs-state.c       2009-01-26 02:58:20.000000000 +0100
@@ -1,5 +1,5 @@
 /* Convert string to wide string.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2009 Free Software Foundation, Inc.
    Written by Bruno Haible <address@hidden>, 2008.
 
    This program is free software: you can redistribute it and/or modify
@@ -20,4 +20,4 @@
 #include <wchar.h>
 
 /* Internal state used by the functions mbsrtowcs() and mbsnrtowcs().  */
-mbstate_t _gl_mbsrtowcs_state;
+mbstate_t _gl_mbsrtowcs_state = 0;
--- lib/wcsrtombs-state.c.orig  2009-01-26 03:01:36.000000000 +0100
+++ lib/wcsrtombs-state.c       2009-01-26 02:59:05.000000000 +0100
@@ -1,5 +1,5 @@
 /* Convert wide string to string.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2009 Free Software Foundation, Inc.
    Written by Bruno Haible <address@hidden>, 2008.
 
    This program is free software: you can redistribute it and/or modify
@@ -20,4 +20,4 @@
 #include <wchar.h>
 
 /* Internal state used by the functions wcsrtombs() and wcsnrtombs().  */
-mbstate_t _gl_wcsrtombs_state;
+mbstate_t _gl_wcsrtombs_state = 0;