Try to fix #1972 (things went wrong when stk tried to delete uninitialised

sound sources).

src/audio/music_information.cpp

@@ -165,7 +165,7 @@ void MusicInformation::startMusic()
         delete m_normal_music;
         m_normal_music = NULL;
         Log::warn("MusicInformation", "Unable to load music %s, "
-                  "not supported or not found.\n",
+                  "not supported or not found.",
                   m_normal_filename.c_str());
         return;
     }

src/audio/sfx_openal.cpp

@@ -67,7 +67,7 @@ SFXOpenAL::SFXOpenAL(SFXBuffer* buffer, bool positional, float volume,
  *  buffer. */
 SFXOpenAL::~SFXOpenAL()
 {
-    if (m_status!=SFX_UNKNOWN)
+    if (m_status!=SFX_UNKNOWN && m_status!=SFX_NOT_INITIALISED)
     {
         alDeleteSources(1, &m_sound_source);
     }