Added missing header comments.

src/physics/aabb.h

@@ -10,14 +10,20 @@
 #include "sphere.h"
 #include "../input/input.h"
 
+/**
+ * Perform a test against a point and an AABB.
+ * 
+ * @param pointX Point X coordinate.
+ * @param pointY Point Y coordinate.
+ * @param x Box X coordinate.
+ * @param y Box Y coordinate.
+ * @param width Box width.
+ * @param height Box height.
+ * @param hit Pointer to hit information to store result in, or NULL for none.
+ * @return True if a hit occured, otherwise false.
+ */
 bool aabbPoint2D(
   float pointX, float pointY,
   float x, float y, float width, float height,
   aabbpointhit2d_t *hit
-);
-
-bool aabbVector2D(
-  float x, float y, float vx, float vy,
-  float bx, float by, float width, float height,
-  aabbvectorhit2d_t *vector
 );