RtfFilter::filter: don't leak pIn

Change-Id: I2510cd7faa48c0287498bdbc2511e29dbc62860a
Factor out SwFmtFollowTextFlow::dumpAsXml() from core

Change-Id: Iafd2db5d878857c517e79f84b8c9c6a806ccfe4b
Factor out SwFmtWrapInfluenceOnObjPos::dumpAsXml() from docnode

Change-Id: I8c52801178c5cf80398a19ebe40d336c69db8065
Factor out SwFmtCol::dumpAsXml() from docnode

Change-Id: Ic41b981c989aec658e95889b72bd76ecacb13a9a