Change to pass an empty string to setlocale instead of NULL (which is illegal in Unix unlike windows). Bug

18338, r=tao.

intl/locale/src/nsLocaleService.cpp

@@ -219,7 +219,7 @@ nsLocaleService::nsLocaleService(void)
     nsresult result = nsComponentManager::CreateInstance(kPosixLocaleFactoryCID,
                            NULL,kIPosixLocaleIID,(void**)&posixConverter);
     if (NS_SUCCEEDED(result) && posixConverter!=nsnull) {
-        char* lc_all = setlocale(LC_ALL,NULL);
+        char* lc_all = setlocale(LC_ALL,"");
         char* lang = getenv("LANG");
 
         if (lc_all!=nsnull) {

intl/locale/src/unix/nsCollationUnix.cpp

@@ -160,7 +160,7 @@ nsresult nsCollationUnix::GetSortKeyLen(const nsCollationStrength strength,
   res = mCollation->UnicodeToChar(stringNormalized, &str, mCharset);
   if (NS_SUCCEEDED(res) && str != NULL) {
     char *cstr = mLocale.ToNewCString();
-    char *old_locale =  setlocale(LC_COLLATE, NULL);
+    char *old_locale =  setlocale(LC_COLLATE, "");
     (void) setlocale(LC_COLLATE, cstr);
     // call strxfrm to calculate a key length 
     int len = strxfrm(NULL, str, 0) + 1;
@@ -188,7 +188,7 @@ nsresult nsCollationUnix::CreateRawSortKey(const nsCollationStrength strength,
   res = mCollation->UnicodeToChar(stringNormalized, &str, mCharset);
   if (NS_SUCCEEDED(res) && str != NULL) {
     char *cstr = mLocale.ToNewCString();
-    char *old_locale =  setlocale(LC_COLLATE, NULL);
+    char *old_locale =  setlocale(LC_COLLATE, "");
     (void) setlocale(LC_COLLATE, cstr);
     // call strxfrm to generate a key 
     int len = strxfrm((char *) key, str, strlen(str));

intl/locale/src/unix/nsDateTimeFormatUnix.cpp

@@ -186,7 +186,7 @@ nsresult nsDateTimeFormatUnix::FormatTMTime(nsILocale* locale,
   }
 
   // generate data/time string
-  char *old_locale = setlocale(LC_TIME, NULL);
+  char *old_locale = setlocale(LC_TIME, "");
   (void) setlocale(LC_TIME, mPlatformLocale);
   if (PL_strlen(fmtD) && PL_strlen(fmtT)) {
     PL_strncat(fmtD, " ", NSDATETIME_FORMAT_BUFFER_LEN);