Change behavior of delegate callbacks during 204 (No Content) respons…

…e. refs RestKit#633

Code/ObjectMapping/RKObjectLoader.m

@@ -293,8 +293,16 @@ - (BOOL)isResponseMappable {
         [self didFailLoadWithError:self.response.failureError];
 		return NO;
     } else if ([self.response isNoContent]) {
-        // The No Content (204) response will never have a message body or a MIME Type. Invoke the delegate with self
-        [self informDelegateOfObjectLoadWithResultDictionary:[NSDictionary dictionaryWithObject:self forKey:@""]];
+        // The No Content (204) response will never have a message body or a MIME Type.
+        id resultDictionary = nil;
+        if (self.targetObject) {
+            resultDictionary = [NSDictionary dictionaryWithObject:self.targetObject forKey:@""];
+        } else if (self.sourceObject) {
+            resultDictionary = [NSDictionary dictionaryWithObject:self.sourceObject forKey:@""];
+        } else {
+            resultDictionary = [NSDictionary dictionary];
+        }
+        [self informDelegateOfObjectLoadWithResultDictionary:resultDictionary];
         return NO;
 	} else if (NO == [self canParseMIMEType:[self.response MIMEType]]) {
         // We can't parse the response, it's unmappable regardless of the status code