Fix bad null check, caused crash on dial.

Change-Id: I1465d784961ca60d11874eabc6ce7c4599019ec5
diff --git a/InCallUI/src/com/android/incallui/AnswerPresenter.java b/InCallUI/src/com/android/incallui/AnswerPresenter.java
index 03c8553..7e18012 100644
--- a/InCallUI/src/com/android/incallui/AnswerPresenter.java
+++ b/InCallUI/src/com/android/incallui/AnswerPresenter.java
@@ -55,7 +55,7 @@
             }
             call = calls.getVideoUpgradeRequestCall();
             Log.d(this, "getVideoUpgradeRequestCall call =" + call);
-            if (call == null) {
+            if (call != null) {
                 processVideoUpgradeRequestCall(call);
             }
         } else {