msvcrt: Don't search for LCID in _setmbcp_l if it was already done.

dlls/msvcrt/locale.c

@@ -842,7 +842,7 @@ MSVCRT__locale_t CDECL MSVCRT__create_locale(int category, const char *locale)
         }
     }
 
-    _setmbcp_l(loc->locinfo->lc_id[MSVCRT_LC_CTYPE].wCodePage, loc->mbcinfo);
+    _setmbcp_l(loc->locinfo->lc_id[MSVCRT_LC_CTYPE].wCodePage, lcid[MSVCRT_LC_CTYPE], loc->mbcinfo);
 
     if(lcid[MSVCRT_LC_MONETARY] && (category==MSVCRT_LC_ALL || category==MSVCRT_LC_MONETARY)) {
         if(update_threadlocinfo_category(lcid[MSVCRT_LC_MONETARY], loc, MSVCRT_LC_MONETARY)) {

dlls/msvcrt/mbcs.c

@@ -184,7 +184,7 @@ int* CDECL ___mb_cur_max_l_func(MSVCRT__locale_t locale)
 /*********************************************************************
  * INTERNAL: _setmbcp_l
  */
-int _setmbcp_l(int cp, MSVCRT_pthreadmbcinfo mbcinfo)
+int _setmbcp_l(int cp, LCID lcid, MSVCRT_pthreadmbcinfo mbcinfo)
 {
   const char format[] = ".%d";
 
@@ -222,8 +222,13 @@ int _setmbcp_l(int cp, MSVCRT_pthreadmbcinfo mbcinfo)
       break;
   }
 
-  sprintf(bufA, format, newcp);
-  mbcinfo->mblcid = MSVCRT_locale_to_LCID(bufA);
+  if(lcid == -1) {
+    sprintf(bufA, format, newcp);
+    mbcinfo->mblcid = MSVCRT_locale_to_LCID(bufA);
+  } else {
+    mbcinfo->mblcid = lcid;
+  }
+
   if(mbcinfo->mblcid == -1)
   {
     WARN("Can't assign LCID to codepage (%d)\n", mbcinfo->mblcid);
@@ -347,7 +352,7 @@ int _setmbcp_l(int cp, MSVCRT_pthreadmbcinfo mbcinfo)
  */
 int CDECL _setmbcp(int cp)
 {
-    return _setmbcp_l(cp, NULL);
+    return _setmbcp_l(cp, -1, NULL);
 }
 
 /*********************************************************************

dlls/msvcrt/msvcrt.h

@@ -888,7 +888,7 @@ MSVCRT_pthreadmbcinfo get_mbcinfo(void);
 void __cdecl MSVCRT__free_locale(MSVCRT__locale_t);
 void free_locinfo(MSVCRT_pthreadlocinfo);
 void free_mbcinfo(MSVCRT_pthreadmbcinfo);
-int _setmbcp_l(int, MSVCRT_pthreadmbcinfo);
+int _setmbcp_l(int, LCID, MSVCRT_pthreadmbcinfo);
 
 #ifndef __WINE_MSVCRT_TEST
 int            __cdecl MSVCRT__write(int,const void*,unsigned int);