Fix potential memory leak

src/hotplug_macosx.c:165:3 Potential leak of an object stored into 'pluginUrl'

We should release pluginUrl _before_ the return.

src/hotplug_macosx.c

@@ -160,12 +160,12 @@ static HPDriverVector HPDriversGetFromDirectory(const char *driverBundlePath)
  }
  bundleArray = CFBundleCreateBundlesFromDirectory(kCFAllocatorDefault,
  pluginUrl, NULL);
+ CFRelease(pluginUrl);
  if (!bundleArray)
  {
  Log1(PCSC_LOG_ERROR, "error getting plugin directory bundles");
  return NULL;
  }
- CFRelease(pluginUrl);
 
  size_t bundleArraySize = CFArrayGetCount(bundleArray);
  size_t i;