+checkpoint: fix .ispc kernels for compilation with llc->ptx

examples_ptx/aobench/ao.ispc

@@ -81,6 +81,9 @@ static inline void vnormalize(vec &v) {
 }
 
 
+#if 1
+inline
+#endif
 static void
 ray_plane_intersect(Isect &isect, Ray &ray, const uniform Plane &plane) {
     float d = -dot(plane.p, plane.n);
@@ -123,6 +126,9 @@ ray_sphere_intersect(Isect &isect, Ray &ray, const uniform Sphere &sphere) {
 }
 
 
+#if 1
+inline
+#endif
 static void
 orthoBasis(vec basis[3], vec n) {
     basis[2] = n;
@@ -146,6 +152,9 @@ orthoBasis(vec basis[3], vec n) {
 }
 
 
+#if 1
+inline
+#endif
 static float
 ambient_occlusion(Isect &isect, const uniform Plane &plane, const uniform Sphere spheres[3],
                   RNGState &rngstate) {