various null checks

Change-Id: I733513a87b81577971fdbdef18ee118124a8fdc8

jami-android/app/src/main/java/cx/ring/adapters/ConversationAdapter.kt

@@ -332,7 +332,7 @@ class ConversationAdapter(
 
         // Remove user from statusMap.
         val modifiedStatusMap = interaction.statusMap
-            .filter { !conversation.findContact(net.jami.model.Uri.fromId(it.key))!!.isUser }
+            .filter { conversation.findContact(net.jami.model.Uri.fromId(it.key))?.isUser != true }
 
         val isDisplayed = modifiedStatusMap.any { it.value == Interaction.MessageStates.DISPLAYED }
         val isReceived = modifiedStatusMap.any { it.value == Interaction.MessageStates.SUCCESS }

jami-android/app/src/main/java/cx/ring/adapters/ConversationMediaGalleryAdapter.kt

@@ -149,9 +149,12 @@ class ConversationMediaGalleryAdapter(
             val videoRatio = mediaPlayer.videoWidth / mediaPlayer.videoHeight.toFloat()
             val screenRatio = video.video.width / video.video.height.toFloat()
             val scaleX = videoRatio / screenRatio
-            if (scaleX >= 1f) {
+            if (scaleX.isNaN() || scaleX.isInfinite() || scaleX <= 0f) {
+                video.video.scaleX = 1f
+                video.video.scaleY = 1f
+            } else if (scaleX >= 1f) {
                 video.video.scaleX = scaleX
-            } else if (scaleX != 0f){
+            } else {
                 video.video.scaleY = 1f / scaleX
             }
         }

jami-android/libjamiclient/src/main/kotlin/net/jami/services/CallService.kt

@@ -750,7 +750,7 @@ abstract class CallService(
     }
 
     fun hangUpAny(accountId: String, callId: String) {
-        calls.filterValues { it.daemonIdString == callId }.firstNotNullOf {
+        calls.filterValues { it.daemonIdString == callId }.forEach {
             val confId = it.value.confId
             if(confId != null)
                 hangUpConference(accountId, confId)