Fix typo in UsbController::isRNDISStarted()

Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/UsbController.cpp b/UsbController.cpp
index 9f4f7ae..0c1fb58 100644
--- a/UsbController.cpp
+++ b/UsbController.cpp
@@ -56,5 +56,5 @@
     char value=0;
     int fd = open("/sys/class/usb_composite/rndis/enable", O_RDWR);
     read(fd, &value, 1);
-    return (value == 1 ? true : false);
+    return (value == '1' ? true : false);
 }