Remove redundant is-null checks on free(Meter.drawData)

Meter.c

@@ -181,7 +181,6 @@ void Meter_delete(Object* cast) {
    if (Meter_doneFn(this)) {
       Meter_done(this);
    }
-   if (this->drawData)
    free(this->drawData);
    free(this->caption);
    free(this->values);
@@ -213,7 +212,6 @@ void Meter_setMode(Meter* this, int modeIndex) {
          Meter_updateMode(this, modeIndex);
    } else {
       assert(modeIndex >= 1);
-      if (this->drawData)
       free(this->drawData);
       this->drawData = NULL;