ScriptREPL: dump exceptions to the OutputStream

We don't want to use the log, but rather the designated stream.

Author: ctrueden

src/main/java/org/scijava/script/ScriptREPL.java

@@ -341,7 +341,7 @@ private List<Gateway> gateways() {
 				gateways.add(gateway);
 			}
 			catch (final Throwable t) {
-				if (log != null) log.error(t);
+				t.printStackTrace(out);
 			}
 		}
 		return gateways;