Fixed a bug where I forgot to increment the labelCounter so there were multiple instances of return labels resulting in an infinite loop

Author: brucesdad13

src/CodeWriter.java

@@ -580,6 +580,7 @@ void writeCall(String functionName, int numArgs) {
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
+        labelCounter++; // increment the label counter for unique labels
         Debug.println("Wrote Call: " + functionName + " " + numArgs);
     }