Andoid EglBase: Detect failure to find EGL config

webrtc/api/java/android/org/webrtc/EglBase10.java

Index: webrtc/api/java/android/org/webrtc/EglBase10.java
diff --git a/webrtc/api/java/android/org/webrtc/EglBase10.java b/webrtc/api/java/android/org/webrtc/EglBase10.java
index fe2b73ee1cc2a542fbe8d5da6188d6609f7996ba..70f9eb73a65ff871574d9d72aa90567a0a0d1573 100644
--- a/webrtc/api/java/android/org/webrtc/EglBase10.java
+++ b/webrtc/api/java/android/org/webrtc/EglBase10.java
@@ -268,9 +268,16 @@ final class EglBase10 extends EglBase {
     int[] numConfigs = new int[1];
     if (!egl.eglChooseConfig(
         eglDisplay, configAttributes, configs, configs.length, numConfigs)) {
+      throw new RuntimeException("eglChooseConfig failed");
+    }
+    if (numConfigs[0] <= 0) {
       throw new RuntimeException("Unable to find any matching EGL config");
     }
-    return configs[0];
+    final EGLConfig eglConfig = configs[0];
+    if (eglConfig == null) {
+      throw new RuntimeException("eglChooseConfig returned null");
+    }
+    return eglConfig;
   }
 
   // Return an EGLConfig, or die trying.