File fix-standalone-run.patch of Package Songbird

--- Source/PluginProcessor.cpp.orig	2020-11-27 11:43:04.217089617 +1000
+++ Source/PluginProcessor.cpp	2020-11-27 11:43:58.053059566 +1000
@@ -165,12 +165,12 @@
     }
 
     juce::AudioPlayHead::CurrentPositionInfo mTempoInfo;
-    getPlayHead()->getCurrentPosition(mTempoInfo);
-
+    if (getPlayHead() != 0 && getPlayHead()->getCurrentPosition(mTempoInfo))
+    {
     mSongbird.mModulator->MOD.prepareForNextBuffer(mTempoInfo.bpm,
                                         mTempoInfo.timeInSeconds,
                                         getSampleRate());
-
+    }
     // This is the place where you'd normally do the guts of your plugin's
     // audio processing...
     // TODO: this can be much better optimised, the 1in1out/1in2out configurations are still doing