Revert "fdo#68657 bool->string conversion to 1/0, not "true"/"false"

This reverts commit b89fb0d0.

It was intended for stble branch only; in master, we let the
incompatible change go through, but we have introduced a
work-around to get the old behaviour again.

connectivity/source/commontools/FValue.cxx

@@ -1024,12 +1024,7 @@ OUString ORowSetValue::getString( ) const
                 aRet = OUString::number(static_cast<bool>(*this));
                 break;
             case DataType::BOOLEAN:
-                // This would be the natural choice,
-                // but historically it was converted to "0" or "1".
-                // For backwards compatibility, continue doing that.
-                // aRet = OUString::boolean(static_cast<bool>(*this));
-                BOOST_STATIC_ASSERT((boost::is_same< sal_Bool, sal_uInt8 >::value));
-                aRet = OUString::number(static_cast<sal_Bool>(*this));
+                aRet = OUString::boolean(static_cast<bool>(*this));
                 break;
             case DataType::TINYINT:
             case DataType::SMALLINT: