Changes readme's #ifdef example to correct #if. Refs #29.

readme.md

@@ -38,11 +38,11 @@ Add the `DCIntrospect` class files to your project, add the QuartzCore framework
     [window makeKeyAndDisplay]
 
     // always call after makeKeyAndDisplay.
-    #ifdef TARGET_IPHONE_SIMULATOR
+    #if TARGET_IPHONE_SIMULATOR
         [[DCIntrospect sharedIntrospector] start];
     #endif
 
-The `#ifdef` to target the simulator is not required but is a good idea to further prevent leaving it on in production code.
+The `#if` to target the simulator is not required but is a good idea to further prevent leaving it on in production code.
 
 Once setup, simply push the space bar to invoke the introspect or then start clicking on views to get info.  You can also tap and drag around the interface.
 
@@ -98,4 +98,4 @@ Made available under the MIT License.
 Collaboration
 -------------
 
-If you have any feature requests/bugfixes etc. feel free to help out and send a pull request, or create a new issue.
+If you have any feature requests/bugfixes etc. feel free to help out and send a pull request, or create a new issue.