fix QPro import filter, related #i41688#

We desperately need a test document for this format.

Change-Id: Ifd8e35bb3330c2b9d2443a3a0f18209001a4bdff

sc/source/filter/qpro/qpro.cxx

@@ -226,7 +226,7 @@ void ScQProReader::readString( OUString &rString, sal_uInt16 nLength )
     sal_Char* pText = new sal_Char[ nLength + 1 ];
     mpStream->Read( pText, nLength );
     pText[ nLength ] = 0;
-    rString = OUString( pText, nLength, mpStream->GetStreamCharSet() );
+    rString = OUString( pText, std::strlen(pText), mpStream->GetStreamCharSet() );
     delete [] pText;
 }