Merge pull request #64 from tocco/fix_extended_decimal_format_parser

FREEMARKER-125: ExtendedDecimalFormatParser now picks up DecimalFormatSymbols provided by DecimalFormatSymbolsProvider SPI.
diff --git a/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java b/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java
index af48f07..398f382 100644
--- a/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java
+++ b/src/main/java/freemarker/core/ExtendedDecimalFormatParser.java
@@ -468,7 +468,7 @@
 
     private ExtendedDecimalFormatParser(String formatString, Locale locale) {
         src = formatString;
-        this.symbols = new DecimalFormatSymbols(locale);
+        this.symbols = DecimalFormatSymbols.getInstance(locale);
     }
 
     private ParseException newExpectedSgParseException(String expectedThing) {