qml: fix display of negative millisat amounts in FormattedAmount, qefx.py

electrum/gui/qml/components/controls/FormattedAmount.qml

@@ -24,7 +24,7 @@ GridLayout {
     }
     Label {
         visible: valid
-        text: amount.msatsInt > 0 ? Config.formatMilliSats(amount) : Config.formatSats(amount)
+        text: amount.msatsInt != 0 ? Config.formatMilliSats(amount) : Config.formatSats(amount)
         font.family: FixedFont
     }
     Label {

electrum/gui/qml/qefx.py

@@ -101,7 +101,7 @@ class QEFX(QObject, QtEventListener):
     def fiatValue(self, satoshis, plain=True):
         rate = self.fx.exchange_rate()
         if isinstance(satoshis, QEAmount):
-            satoshis = satoshis.msatsInt / 1000 if satoshis.msatsInt > 0 else satoshis.satsInt
+            satoshis = satoshis.msatsInt / 1000 if satoshis.msatsInt != 0 else satoshis.satsInt
         else:
             try:
                 sd = Decimal(satoshis)