fix(infiniteScroll): ensure infinite doesn't fire when already loading
fix(infiniteScroll): ensure infinite doesn't fire when already loading

driftyco/ionic,jhlee8804/ionic,manucorporat/ionic,cambronjay/ionic,jhlee8804/ionic,dennybiasiolli/ionic,alan-agius4/ionic,manucorporat/ionic,jarrodkoch/ionic,janglednerves/ionic,driftyco/ionic,joshesp/ionic,TillaTheHun0/ionic,brianespinosa/ionic2-sass,AbraaoAlves/ionic,driftyco/ionic,TillaTheHun0/ionic,jhlee8804/ionic,alan-agius4/ionic,joshesp/ionic,TillaTheHun0/ionic,alan-agius4/ionic,jarrodkoch/ionic,jarrodkoch/ionic,alan-agius4/ionic,janglednerves/ionic,cambronjay/ionic,janglednerves/ionic,alan-agius4/ionic,cambronjay/ionic,jarrodkoch/ionic,driftyco/ionic,dennybiasiolli/ionic,AbraaoAlves/ionic,alan-agius4/ionic,AbraaoAlves/ionic,joshesp/ionic,dennybiasiolli/ionic,jhlee8804/ionic,dennybiasiolli/ionic,driftyco/ionic,jarrodkoch/ionic,TillaTheHun0/ionic,cambronjay/ionic,joshesp/ionic,janglednerves/ionic,cambronjay/ionic,jhlee8804/ionic,janglednerves/ionic,AbraaoAlves/ionic,manucorporat/ionic,manucorporat/ionic,manucorporat/ionic,AbraaoAlves/ionic,dennybiasiolli/ionic