Dennis Harvey Film Critic Now on its ninth feature entry in just a decade, the “Conjuring” franchise has proved something of a powerhouse in the continued growth of horror as one of the most reliably popular (not to mention cost-effective) mainstream film genres. Their mythologies may be garbled and silly, the scares mostly “jump” ones, yet these movies provide a kind of creepy comfort food — familiarly formulaic jolts unlikely to trouble any non-child viewer’s sleep later on — whose satisfactions are amplified by the good actors and superior atmospherics deployed.