Fix a couple comments about coordinate handedness

Alc/effects/reverb.c

@@ -1073,9 +1073,9 @@ static aluMatrixf GetTransformFromVector(const ALfloat *vec)
     /* Normalize the panning vector according to the N3D scale, which has an
      * extra sqrt(3) term on the directional components. Converting from OpenAL
      * to B-Format also requires negating X (ACN 1) and Z (ACN 3). Note however
-     * that the reverb panning vectors use right-handed coordinates, unlike the
-     * rest of OpenAL which use left-handed. This is fixed by negating Z, which
-     * cancels out with the B-Format Z negation.
+     * that the reverb panning vectors use left-handed coordinates, unlike the
+     * rest of OpenAL which use right-handed. This is fixed by negating Z,
+     * which cancels out with the B-Format Z negation.
      */
     mag = sqrtf(vec[0]*vec[0] + vec[1]*vec[1] + vec[2]*vec[2]);
     if(mag > 1.0f)

examples/almultireverb.c

@@ -281,7 +281,7 @@ static void UpdateListenerAndEffects(float timediff, const ALuint slots[2], cons
 
     /* Calculate local_dir, which represents the listener-relative point to the
      * adjacent zone (should also include orientation). Because EAX Reverb uses
-     * right-handed coordinates instead of left-handed like the rest of OpenAL,
+     * left-handed coordinates instead of right-handed like the rest of OpenAL,
      * negate Z for the local values.
      */
     local_dir[0] = portal_pos[0] - listener_pos[0];