fix bug 87413. r=shanjian sr=sfraser

backout shanjian's check in which cuase infinite loop while
auto detect is turn on and got different result from meta tag

docshell/base/nsWebShell.cpp

@@ -630,11 +630,14 @@ nsWebShell::ReloadDocument(const char* aCharset,
       {
          muDV->SetHintCharacterSet(NS_ConvertASCIItoUCS2(aCharset).get());
          muDV->SetHintCharacterSetSource((PRInt32)aSource);
+         if(eCharsetReloadRequested != mCharsetReloadState) 
+         {
             mCharsetReloadState = eCharsetReloadRequested;
             return Reload(LOAD_FLAGS_CHARSET_CHANGE);
          }
       }
     }
+  }
   return NS_OK;
 }