drop unnecessary RTFDocumentImpl::isEmpty

Change-Id: I657266697c30be0760971528adb1abf07f03ea23

writerfilter/source/rtftok/rtfdocumentimpl.cxx

@@ -3902,11 +3902,6 @@ int RTFDocumentImpl::getGroup() const
     return m_nGroup;
 }
 
-bool RTFDocumentImpl::isEmpty() const
-{
-    return m_aStates.empty();
-}
-
 void RTFDocumentImpl::setDestinationText(OUString& rString)
 {
     m_aStates.top().aDestinationText.setLength(0);

writerfilter/source/rtftok/rtfdocumentimpl.hxx

@@ -424,8 +424,7 @@ namespace writerfilter {
                 void seek(sal_uInt32 nPos);
                 uno::Reference<lang::XMultiServiceFactory> getModelFactory();
                 RTFParserState& getState();
-                /// If the stack of states is empty.
-                bool isEmpty() const;
+                /// Number of states on the stack.
                 int getGroup() const;
                 void setDestinationText(rtl::OUString& rString);
                 /// Resolve a picture: If not inline, then anchored.

writerfilter/source/rtftok/rtftokenizer.cxx

@@ -95,7 +95,7 @@ int RTFTokenizer::resolveParse()
 
         if (m_rImport.getGroup() < 0)
             return ERROR_GROUP_UNDER;
-        if (!m_rImport.isEmpty() && m_rImport.getState().nInternalState == INTERNAL_BIN)
+        if (m_rImport.getGroup() > 0 && m_rImport.getState().nInternalState == INTERNAL_BIN)
         {
             ret = m_rImport.resolveChars(ch);
             if (ret)
@@ -130,7 +130,7 @@ int RTFTokenizer::resolveParse()
                 case 0x0a:
                     break; // ignore these
                 default:
-                    if (m_rImport.isEmpty())
+                    if (m_rImport.getGroup() == 0)
                         return ERROR_CHAR_OVER;
                     if (m_rImport.getState().nInternalState == INTERNAL_NORMAL)
                     {