According to the testimony of suspects and evidence collected by police, the men who set fire to a restaurant, leaving one dead and four injured Thursday evening, had not intended to start a fire, but had merely wanted to splash paint in the restaurant in order to intimidate a debtor. The paint, however, was mixed with lacquer and paint-thinner, and as the liquid came into contact with flames on the gas stove, the mixture ignited, causing an instant, intensive blaze