Fix possible zynaddsubfx crash when loading project

source/native-plugins/zynaddsubfx/Misc/Master.cpp

@@ -618,7 +618,7 @@ int msg_id=0;
 /*
  * Master audio out (the final sound)
  */
-void Master::AudioOut(float *outl, float *outr)
+bool Master::AudioOut(float *outl, float *outr)
 {
     //Danger Limits
     if(memory->lowMemory(2,1024*1024))
@@ -645,7 +645,7 @@ void Master::AudioOut(float *outl, float *outr)
             if (mastercb)
                 mastercb(mastercb_ptr, new_master);
             bToU->write("/free", "sb", "Master", sizeof(Master*), &this_master);
-            return;
+            return false;
         }
 
         //XXX yes, this is not realtime safe, but it is useful...
@@ -821,6 +821,8 @@ void Master::AudioOut(float *outl, float *outr)
 
     //update the global frame timer
     time++;
+
+    return true;
 }
 
 //TODO review the respective code from yoshimi for this
@@ -846,7 +848,9 @@ void Master::GetAudioOutSamples(size_t nsamples,
             nsamples -= smps;
 
             //generate samples
-            AudioOut(bufl, bufr);
+            if (! AudioOut(bufl, bufr))
+                return;
+
             off  = 0;
             out_off  += smps;
             smps = synth.buffersize;

source/native-plugins/zynaddsubfx/Misc/Master.h

@@ -100,7 +100,7 @@ class Master
         void vuUpdate(const float *outl, const float *outr);
 
         /**Audio Output*/
-        void AudioOut(float *outl, float *outr) REALTIME;
+        bool AudioOut(float *outl, float *outr) REALTIME;
         /**Audio Output (for callback mode).
          * This allows the program to be controled by an external program*/
         void GetAudioOutSamples(size_t nsamples,