[Yaml] Fix ClassCastException in YamlParser

Change-Id: I421b978c4540278265833c2dcb3f2148a0903b80

yaml/org.eclipse.statet.yaml.core/src/org/eclipse/statet/yaml/core/ast/YamlParser.java

diff --git a/yaml/org.eclipse.statet.yaml.core/src/org/eclipse/statet/yaml/core/ast/YamlParser.java b/yaml/org.eclipse.statet.yaml.core/src/org/eclipse/statet/yaml/core/ast/YamlParser.java
index c34c71b..fe8fcc2 100644
--- a/yaml/org.eclipse.statet.yaml.core/src/org/eclipse/statet/yaml/core/ast/YamlParser.java
+++ b/yaml/org.eclipse.statet.yaml.core/src/org/eclipse/statet/yaml/core/ast/YamlParser.java
@@ -35,6 +35,7 @@
 
 import org.yaml.snakeyaml.error.Mark;
 import org.yaml.snakeyaml.tokens.AliasToken;
+import org.yaml.snakeyaml.tokens.AnchorToken;
 import org.yaml.snakeyaml.tokens.ScalarToken;
 import org.yaml.snakeyaml.tokens.TagToken;
 import org.yaml.snakeyaml.tokens.TagTuple;
@@ -535,7 +536,7 @@
 				final YamlAstNode currentNode= nonNullAssert(this.currentNode);
 				final Label node= new Label.Anchor(currentNode,
 						token.getStartMark().getIndex(), token.getEndMark().getIndex(),
-						((AliasToken) token).getValue() );
+						((AnchorToken)token).getValue() );
 				addChildTerm(node);
 				checkForProblem(token.getStartMark(), node);
 				continue;
@@ -544,7 +545,7 @@
 				final YamlAstNode currentNode= nonNullAssert(this.currentNode);
 				final Label node= new Label.Reference(currentNode,
 						token.getStartMark().getIndex(), token.getEndMark().getIndex(),
-						((AliasToken) token).getValue() );
+						((AliasToken)token).getValue() );
 				addChildTerm(node);
 				checkForProblem(token.getStartMark(), node);
 				continue;