[Android] VideoHelper: add nullity check

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Tue Feb  5 15:29:49 2019 +0100| [70c5bdc090ad0b41e115bd64cc6b481ac712d782] | committer: Geoffrey Métais

VideoHelper: add nullity check

> https://code.videolan.org/videolan/vlc-android/commit/70c5bdc090ad0b41e115bd64cc6b481ac712d782
---

 libvlc/src/org/videolan/libvlc/VideoHelper.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libvlc/src/org/videolan/libvlc/VideoHelper.java b/libvlc/src/org/videolan/libvlc/VideoHelper.java
index c5ed5ee11..b03dc3ece 100644
--- a/libvlc/src/org/videolan/libvlc/VideoHelper.java
+++ b/libvlc/src/org/videolan/libvlc/VideoHelper.java
@@ -193,7 +193,7 @@ class VideoHelper implements IVLCVout.OnNewVideoLayoutListener {
         if (activity != null) {
             sw = activity.getWindow().getDecorView().getWidth();
             sh = activity.getWindow().getDecorView().getHeight();
-        } else if (mDisplayManager.getPresentation() != null && mDisplayManager.getPresentation().getWindow() != null) {
+        } else if (mDisplayManager != null && mDisplayManager.getPresentation() != null && mDisplayManager.getPresentation().getWindow() != null) {
             sw = mDisplayManager.getPresentation().getWindow().getDecorView().getWidth();
             sh = mDisplayManager.getPresentation().getWindow().getDecorView().getHeight();
         } else return;