Fix comparison to string

Author: DarkFenX

gui/builtinStatsViews/bombingViewFull.py

@@ -150,7 +150,7 @@ def refreshPanel(self, fit):
                                      bomb.attributes['signatureRadius'].value)
                 label = getattr(self, "labelDamagetypeCovertlevel%s%s" % (damageType.capitalize(), covertLevel))
                 label.SetLabel("{:.1f}".format(math.ceil((ehp / appliedBombDamage) * 10) / 10))
-                if covertLevel is not "0":
+                if covertLevel != "0":
                     label.SetToolTip("Number of %s to kill a %s using a %s "
                                  "with Covert Ops level %s" % (bomb.customName, fit.name, bomber, covertLevel))
                 else: