Quaternion: correct 2 old mistakes in the javadoc

Author: stephengold

jme3-core/src/main/java/com/jme3/math/Quaternion.java

@@ -1151,7 +1151,7 @@ public Vector3f mult(Vector3f v, Vector3f store) {
      * result is returned as a new quaternion.
      *
      * @param scalar
-     *            the quaternion to multiply this quaternion by.
+     *            the scalar to multiply this quaternion by.
      * @return the new quaternion.
      */
     public Quaternion mult(float scalar) {
@@ -1163,7 +1163,7 @@ public Quaternion mult(float scalar) {
      * result is stored locally.
      *
      * @param scalar
-     *            the quaternion to multiply this quaternion by.
+     *            the scalar to multiply this quaternion by.
      * @return this.
      */
     public Quaternion multLocal(float scalar) {