Backport #496 fix

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/node/TextNode.java

@@ -177,9 +177,13 @@ public String asText(String defaultValue) {
     @Override
     public boolean asBoolean(boolean defaultValue) {
         if (_value != null) {
-            if ("true".equals(_value.trim())) {
+            String v = _value.trim();
+            if ("true".equals(v)) {
                 return true;
             }
+            if ("false".equals(v)) {
+                return false;
+            }
         }
         return defaultValue;
     }

src/test/java/com/fasterxml/jackson/databind/node/TestJsonNode.java

@@ -31,6 +31,11 @@ public void testText()
 
         assertEquals("foobar", n.asText("barf"));
         assertEquals("", empty.asText("xyz"));
+
+        assertTrue(TextNode.valueOf("true").asBoolean(true));
+        assertTrue(TextNode.valueOf("true").asBoolean(false));
+        assertFalse(TextNode.valueOf("false").asBoolean(true));
+        assertFalse(TextNode.valueOf("false").asBoolean(false));
     }
 
     public void testBoolean()