Fix missing initialization of some sound buffer

src/audio/dummy_sfx.hpp

@@ -66,7 +66,7 @@ public:
     virtual SFXStatus  getStatus() OVERRIDE { return SFX_STOPPED; }
     virtual void       onSoundEnabledBack() OVERRIDE {}
     virtual void       setRolloff(float rolloff) OVERRIDE {}
-    virtual const SFXBuffer* getBuffer() const OVERRIDE { return NULL; }
+    virtual SFXBuffer* getBuffer() const OVERRIDE { return NULL; }
 
 };   // DummySFX
 

src/audio/sfx_base.hpp

@@ -82,7 +82,7 @@ public:
     virtual void       reallySetMasterVolumeNow(float gain) = 0;
     virtual void       onSoundEnabledBack()                 = 0;
     virtual void       setRolloff(float rolloff)            = 0;
-    virtual const SFXBuffer* getBuffer() const              = 0;
+    virtual SFXBuffer* getBuffer() const                    = 0;
     virtual SFXStatus  getStatus()                          = 0;
 
 };   // SFXBase

src/audio/sfx_manager.cpp

@@ -941,6 +941,9 @@ void SFXManager::reallyResumeAllNow()
     for (std::vector<SFXBase*>::iterator i =m_all_sfx.getData().begin();
                                          i!=m_all_sfx.getData().end(); i++)
     {
+        // Some buffer not added to m_all_sfx_types need to be loaded here
+        // For example sound for entering challenge house in overworld
+        (*i)->getBuffer()->load();
         (*i)->reallyResumeNow();
     }   // for i in m_all_sfx
     m_all_sfx.unlock();

src/audio/sfx_openal.hpp

@@ -114,7 +114,7 @@ public:
 
     // ------------------------------------------------------------------------
     /** Returns the buffer associated with this sfx. */
-    virtual const SFXBuffer* getBuffer() const OVERRIDE
+    virtual SFXBuffer* getBuffer() const OVERRIDE
                                                      { return m_sound_buffer; }
 
 };   // SFXOpenAL