Fix for cell change OpenAL music streaming issue

sound/outputs/openal_out.cpp

@@ -30,8 +30,11 @@ static char tmp_buffer[BSIZE];
 // Number of buffers used (per sound) for streaming sounds. Each
 // buffer is of size BSIZE. Increasing this will make streaming sounds
 // more fault tolerant against temporary lapses in call to update(),
-// but will also increase memory usage. 4 should be ok.
+// but will also increase memory usage.
-const int STREAM_BUF_NUM = 4;
+// This was changed from 4 to 150 for an estimated 30 seconds tolerance.
+// At some point we should replace it with a more multithreading-ish
+// solution.
+const int STREAM_BUF_NUM = 150;
 
 static void fail(const std::string &msg)
 { throw std::runtime_error("OpenAL exception: " + msg); }
@@ -101,7 +104,7 @@ class Mangle::Sound::OpenAL_Sound : public Sound
   ALuint inst;
 
   // Buffers. Only the first is used for non-streaming sounds.
-  ALuint bufferID[4];
+  ALuint bufferID[STREAM_BUF_NUM];
 
   // Number of buffers used
   int bufNum;