Fix currencyToInteger returning null when amount is zero (#915)

Fixes #913. (And probably a few other similar bugs)

packages/desktop-client/src/components/accounts/Account.js

@@ -195,10 +195,15 @@ function ReconcileTooltip({ account, onReconcile, onClose }) {
   let balance = useSheetValue(queries.accountBalance(account));
 
   function onSubmit(e) {
+    e.preventDefault();
     let input = e.target.elements[0];
     let amount = currencyToInteger(input.value);
-    onReconcile(amount == null ? balance : amount);
-    onClose();
+    if (amount != null) {
+      onReconcile(amount == null ? balance : amount);
+      onClose();
+    } else {
+      input.select();
+    }
   }
 
   return (

packages/loot-core/src/shared/util.ts

@@ -354,7 +354,7 @@ export function currencyToAmount(str) {
 
 export function currencyToInteger(str) {
   let amount = currencyToAmount(str);
-  return amount ? amountToInteger(amount) : null;
+  return amount == null ? null : amountToInteger(amount);
 }
 
 export function stringToInteger(str) {

upcoming-release-notes/915.md

@@ -0,0 +1,6 @@
+---
+category: Bugfix
+authors: [j-f1]
+---
+
+Fix reconciling a budget with a zero value