add no-arg ctor for RussianAnalyzer - makes it easier for tools to use this analyzer

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150174 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/lucene/analysis/ru/RussianAnalyzer.java

@@ -224,6 +224,13 @@ public final class RussianAnalyzer extends Analyzer
      */
     private char[] charset;
 
+
+    public RussianAnalyzer() {
+        charset = RussianCharsets.UnicodeRussian;
+        stoptable = StopFilter.makeStopTable(
+                    makeStopWords(RussianCharsets.UnicodeRussian));
+    }
+
     /**
      * Builds an analyzer.
      */