remove call to isNaN

Author: GarboMuffin

src/compiler/jsexecute.js

@@ -223,7 +223,7 @@ runtimeFunctions.retire = `const retire = () => {
     thread.target.runtime.sequencer.retireThread(thread);
 }`;
 
-runtimeFunctions.NaNToZero = `const NaNToZero = value => isNaN(value) ? 0 : value`;
+runtimeFunctions.NaNToZero = `const NaNToZero = value => value === value ? value : 0`;
 
 /**
  * Scratch cast to boolean.