msvcrt: Initialize exported common variables to fix the build on Mac OS.

dlls/msvcrt/ctype.c

@@ -55,7 +55,7 @@ WORD MSVCRT__ctype [257] = {
  * changes to affect ctypes (i.e. isleadbyte), we use a second table
  * and update its flags whenever the current locale changes.
  */
-WORD* MSVCRT__pctype;
+WORD* MSVCRT__pctype = NULL;
 
 /*********************************************************************
  *		__pctype_func (MSVCRT.@)

dlls/msvcrt/locale.c

@@ -44,8 +44,8 @@ WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
 #define MAX_ELEM_LEN 64 /* Max length of country/language/CP string */
 #define MAX_LOCALE_LENGTH 256
 MSVCRT__locale_t MSVCRT_locale = NULL;
-int MSVCRT___lc_codepage;
-int MSVCRT___lc_collate_cp;
+int MSVCRT___lc_codepage = 0;
+int MSVCRT___lc_collate_cp = 0;
 HANDLE MSVCRT___lc_handle[MSVCRT_LC_MAX - MSVCRT_LC_MIN + 1] = { 0 };
 unsigned char charmax = CHAR_MAX;