fix in path tracer: getparam 1i -> 1f for float value
fix in path tracer: getparam 1i -> 1f for float value

Twinklebear/OSPRay,MengjiaoH/ospray,wilsonCernWq/ospray,wilsonCernWq/ospray,MengjiaoH/ospray,wilsonCernWq/ospray,favreau/OSPRay,ospray/OSPRay,favreau/OSPRay,MengjiaoH/ospray,favreau/OSPRay,Twinklebear/OSPRay,Twinklebear/OSPRay,ospray/OSPRay,favreau/OSPRay,ospray/OSPRay,MengjiaoH/ospray,ospray/OSPRay,Twinklebear/OSPRay,MengjiaoH/ospray