Make NumberFormat use the ICU currency data, fix bug in NumberFormat

src/i18n.cc

Index: src/i18n.cc
diff --git a/src/i18n.cc b/src/i18n.cc
index 1d735c97f1f04876c1adc250be22e214c55ead54..c10890e89e5937928930963a8c27367f937c177d 100644
--- a/src/i18n.cc
+++ b/src/i18n.cc
@@ -258,7 +258,24 @@ icu::DecimalFormat* CreateICUNumberFormat(
 #endif
 
       number_format = static_cast<icu::DecimalFormat*>(
-          icu::NumberFormat::createInstance(icu_locale, format_style,  status));
+          icu::NumberFormat::createInstance(icu_locale, format_style, status));
+
+      if (U_FAILURE(status)) {
+        delete number_format;
+        return NULL;
+      }
+
+      UErrorCode status_digits = U_ZERO_ERROR;
+      uint32_t fraction_digits = ucurr_getDefaultFractionDigits(
+        currency.getTerminatedBuffer(), &status_digits);
+      if (U_SUCCESS(status_digits)) {
+        number_format->setMinimumFractionDigits(fraction_digits);
+        number_format->setMaximumFractionDigits(fraction_digits);
+      } else {
+        // Set min & max to default values (previously in i18n.js)
+        number_format->setMinimumFractionDigits(0);
+        number_format->setMaximumFractionDigits(3);
+      }
     } else if (style == UNICODE_STRING_SIMPLE("percent")) {
       number_format = static_cast<icu::DecimalFormat*>(
           icu::NumberFormat::createPercentInstance(icu_locale, status));