Fix second uncaught exception

Author: Thrameos

native/common/jp_exception.cpp

@@ -220,7 +220,8 @@ void JPypeException::convertJavaToPython()
 			PyJPException_normalize(frame, prev, jcause, th);
 			PyException_SetCause(cause.get(), prev.keep());
 		}
-		PyException_SetTraceback(cause.get(), trace.get());
+		if (trace.get() != nullptr)
+			PyException_SetTraceback(cause.get(), trace.get());
 		PyException_SetCause(pyvalue.get(), cause.keep());
 	}	catch (JPypeException& ex)
 	{

native/python/pyjp_object.cpp

@@ -390,7 +390,7 @@ void PyJPException_normalize(JPJavaFrame frame, JPPyObject exc, jthrowable th, j
 	{
 		// Attach the frame to first
 		JPPyObject trace = PyTrace_FromJavaException(frame, th, enclosing);
-		if (trace.get()!=nullptr)
+		if (trace.get() != nullptr)
 			PyException_SetTraceback(exc.get(), trace.get());
 
 		// Check for the next in the cause list