Update ResearchKit.podspec

To 1.1.2

ResearchKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'ResearchKit'
-  s.version      = '1.1.1'
+  s.version      = '1.1.2'
   s.summary      = 'ResearchKit is an open source software framework that makes it easy to create apps for medical research or for other research projects.'
   s.homepage     = 'https://www.github.com/ResearchKit/ResearchKit'
   s.documentation_url = 'http://researchkit.github.io/docs/'

ResearchKit/ActiveTasks/ORKAudioGenerator.m

@@ -149,14 +149,14 @@ OSStatus ORKAudioGeneratorRenderTone(void *inRefCon,
 
 - (void)applicationDidBecomeActive:(NSNotification *)notification {
     if (_toneUnit) {
-        OSErr err = AudioOutputUnitStart(_toneUnit);
+        __unused OSErr err = AudioOutputUnitStart(_toneUnit);
         NSAssert1(err == noErr, @"Error starting unit: %hd", err);
     }
 }
 
 - (void)applicationWillResignActive:(NSNotification *)notification {
     if (_toneUnit) {
-        OSErr err = AudioOutputUnitStop(_toneUnit);
+        __unused OSErr err = AudioOutputUnitStop(_toneUnit);
         NSAssert1(err == noErr, @"Error stopping unit: %hd", err);
     }
 }