[automerger] Add check preventing div0 issue am: 27e47ce3c3 am: 357017a262 am: fef8617324 am: a7d57f7a14 am: 19d80c34be am: 96fa1d1842 am: 1ed02297a9 am: 0b4dbc600b

Change-Id: I063bac112e8a4c45a03503f9106fe6ab30ecb7ea