Ananth Narayan Mahadevan’s “Red Alert: The War Within” deserves credit for veering off the beaten Bollywood path to take on an unusual subject — India’s Maoist rebels, the Naxalites. But the film, much of it set in a rebel camp in Andhra Pradesh, seems torn between two storytelling modes: episodic with a documentary flavor and action-driven pulp. It makes a hash of both.