more accurately removed unnecessary code

xml/xml-psi-impl/src/com/intellij/lexer/XmlHighlightingLexer.java

@@ -38,7 +38,7 @@ public class XmlHighlightingLexer extends DelegateLexer {
   }
 
   private IElementType fixWrongTokenTypes(IElementType tokenType) {
-    int state = getState();
+    int state = getState() & 0x1f; // __XmlLexer.C_COMMENT_END is last state with value 30
     if (tokenType == XmlTokenType.XML_NAME) {
       if (state == __XmlLexer.TAG || state == __XmlLexer.END_TAG) {
         // translate XML names for tags into XmlTagName

xml/xml-psi-impl/src/com/intellij/lexer/_XmlLexer.flex

@@ -64,6 +64,7 @@ import com.intellij.psi.xml.*;
 %state DOCTYPE
 %xstate CDATA
 %state C_COMMENT_START
+/* this state should be last, number of states should be less than 16 */
 %state C_COMMENT_END
 
 ALPHA=[:letter:]