Fix for issue #2. StackOverflow when using databaseId.

Author: emacarron

src/main/java/org/apache/ibatis/builder/xml/XMLStatementBuilder.java

@@ -169,7 +169,7 @@ private boolean databaseIdMatchesCurrent(String id, String databaseId, String re
       // skip this statement if there is a previous one with a not null databaseId
       id = builderAssistant.applyCurrentNamespace(id, false);
       if (this.configuration.hasStatement(id, false)) {
-        MappedStatement previous = this.configuration.getMappedStatement(id);
+        MappedStatement previous = this.configuration.getMappedStatement(id, false); // issue #2
         if (previous.getDatabaseId() != null) {
           return false;
         }