Added method to remove loaded sound

include/Sound.h

     int addWave(unsigned char *wav, unsigned int length, int *source, unsigned int flags);
 
     /*!
+     * \brief Remove a loaded sound
+     * \param source valid source id
+     */
+    void remove(int source);
+
+    /*!
      * \brief Play sound source
      * \param source sound source to play
      */

src/Sound.cpp

 }
 
 
+void Sound::remove(int source) {
+    assert(source >= 0);
+    assert(source < mNext);
+
+    alDeleteSources(1, &mSource[source]);
+    alDeleteBuffers(1, &mBuffer[source]);
+
+    if (source == (mNext - 1))
+        mNext--;
+}
+
+
 void Sound::play(int source)
 {
     assert(mInit == true);