Merge pull request #32 from sharwell/fix-java6-error

Fix Java 6 build error

Author: sharwell

src/adaptor/org/antlr/intellij/adaptor/parser/AstBuilderListener.java

@@ -53,7 +53,7 @@ public AstBuilderListener(Language language, Parser parser, PsiBuilder builder)
 
 			@Override
 			public int compare(SyntaxError o1, SyntaxError o2) {
-				return Integer.compare(getStart(o1), getStart(o2));
+				return Integer.valueOf(getStart(o1)).compareTo(getStart(o2));
 			}
 		});
 	}