Fix EA-82166. NPE. loadModel() can return null, and it's a bad idea to call methods on a null pointer.

(cherry picked from commit cf033d0)
(cherry picked from commit 37dc0ae)

plugins/lint/lint-idea/src/org/jetbrains/android/inspections/klint/AndroidModelFacade.kt

@@ -50,6 +50,8 @@ class AndroidModelFacade(val facet: AndroidFacet) {
                     ?.call(facet)
         }
 
+        val model = model ?: return null
+
         return modelClass?.kotlin?.memberFunctions
                 ?.firstOrNull { it.name == methodName }
                 ?.call(model)