Improve code style in ray.h

- 2 spaces instead of 4, for indentation
- Newline after return
- Check if pointer is null

include/cglm/ray.h

@@ -30,9 +30,9 @@
 CGLM_INLINE
 bool
 glm_ray_triangle(vec3 origin, vec3 direction, vec3 v0, vec3 v1, vec3 v2, float *d) {
-    const float epsilon = 0.000001;
   vec3        edge1, edge2, p, t, q;
-    float det, inv_det, u, v;
+  float       det, inv_det, u, v, dist;
+  const float epsilon = 0.000001;
 
   glm_vec3_sub(v1, v0, edge1);
   glm_vec3_sub(v2, v0, edge2);
@@ -43,6 +43,7 @@ glm_ray_triangle(vec3 origin, vec3 direction, vec3 v0, vec3 v1, vec3 v2, float *
 
   if (det > -epsilon && det < epsilon)
     return 0;
+
   inv_det = 1.0 / det;
 
   glm_vec3_sub(origin, v0, t);
@@ -59,8 +60,16 @@ glm_ray_triangle(vec3 origin, vec3 direction, vec3 v0, vec3 v1, vec3 v2, float *
   if (v < 0.0 || u + v > 1.0)
     return 0;
 
-    *d = inv_det * glm_vec3_dot(edge2, q);
-    return *d > epsilon;
+  dist = inv_det * glm_vec3_dot(edge2, q);
+  if (dist > epsilon) {
+    if (d != NULL) {
+      *d = dist;
+    }
+
+    return 1;
+  }
+
+  return 0;
 }
 
 #endif