Use "!=" instead of "<" to compare current it with end it

Change-Id: Ic2ed4b935ecf1d63065bc5147e62d510e73bd5c5

svtools/source/brwbox/brwbox1.cxx

@@ -236,8 +236,8 @@ void BrowseBox::InsertHandleColumn( sal_uLong nWidth )
     {
         BrowserColumns::iterator iCol = pCols->begin();
         const BrowserColumns::iterator colsEnd = pCols->end();
-        if ( iCol < colsEnd )
-            for (++iCol; iCol < colsEnd; ++iCol)
+        if ( iCol != colsEnd )
+            for (++iCol; iCol != colsEnd; ++iCol)
                 OSL_ENSURE( (*iCol)->GetId() != HandleColumnId, "BrowseBox::InsertHandleColumn: there is a non-Handle column with handle ID" );
     }
 #endif
@@ -269,7 +269,7 @@ void BrowseBox::InsertDataColumn( sal_uInt16 nItemId, const OUString& rText,
 #if OSL_DEBUG_LEVEL > 0
     {
         const BrowserColumns::iterator colsEnd = pCols->end();
-        for (BrowserColumns::iterator iCol = pCols->begin(); iCol < colsEnd; ++iCol)
+        for (BrowserColumns::iterator iCol = pCols->begin(); iCol != colsEnd; ++iCol)
             OSL_ENSURE( (*iCol)->GetId() != nItemId, "BrowseBox::InsertDataColumn: duplicate column Id" );
     }
 #endif