[qt] BitcoinUnits::format with zero decimals

Formatting with zero decimals will now result in 123 instead of 123.0

Author: GreatSock

src/qt/bitcoinunits.cpp

@@ -100,9 +100,7 @@ QString BitcoinUnits::format(int unit, const CAmount& nIn, bool fPlus, Separator
     int num_decimals = decimals(unit);
     qint64 n_abs = (n > 0 ? n : -n);
     qint64 quotient = n_abs / coin;
-    qint64 remainder = n_abs % coin;
     QString quotient_str = QString::number(quotient);
-    QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
 
     // Use SI-style thin space separators as these are locale independent and can't be
     // confused with the decimal marker.
@@ -116,7 +114,14 @@ QString BitcoinUnits::format(int unit, const CAmount& nIn, bool fPlus, Separator
         quotient_str.insert(0, '-');
     else if (fPlus && n > 0)
         quotient_str.insert(0, '+');
-    return quotient_str + QString(".") + remainder_str;
+
+    if (num_decimals > 0) {
+        qint64 remainder = n_abs % coin;
+        QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
+        return quotient_str + QString(".") + remainder_str;
+    } else {
+        return quotient_str;
+    }
 }