[react-native-calendar-events] Null check empty cursor

ios/Podfile.lock

     - React/Core (= 0.51.0)
   - react-native-background-timer (2.0.0):
     - React
-  - react-native-calendar-events (1.4.3):
+  - react-native-calendar-events (1.5.0):
     - React
   - react-native-fetch-blob (0.10.6):
     - React/Core

package-lock.json

       "integrity": "sha512-vLNJIedXQZN4p3ChFsAgVHacnJqQMnLl+wBsnZuliRkmsjEHo8kQOA9fnLih/OoiDi1O3eHQvXC5L8f+RYiKgw=="
     },
     "react-native-calendar-events": {
-      "version": "1.4.3",
-      "resolved": "https://registry.npmjs.org/react-native-calendar-events/-/react-native-calendar-events-1.4.3.tgz",
-      "integrity": "sha1-KYBOi0TWlG5pq1ogkC2USe0xXEc="
+      "version": "github:jitsi/react-native-calendar-events#dabfabc4bacc1424a8b93ebdda6f3820dee198cb"
     },
     "react-native-callstats": {
       "version": "3.27.0",

package.json

     "react-i18next": "4.8.0",
     "react-native": "0.51.0",
     "react-native-background-timer": "2.0.0",
-    "react-native-calendar-events": "1.4.3",
+    "react-native-calendar-events": "github:jitsi/react-native-calendar-events#dabfabc4bacc1424a8b93ebdda6f3820dee198cb",
     "react-native-callstats": "3.27.0",
     "react-native-fetch-blob": "github:flatfox-ag/react-native-fetch-blob#exception_fixes",
     "react-native-img-cache": "1.5.2",