catch exceptions thrown at ViewPagerActivity

app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt

@@ -91,8 +91,14 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
                 cursor?.close()
             }
         } else {
+            try {
                 mPath = intent.getStringExtra(MEDIUM)
                 mShowAll = config.showAll
+            } catch (e: Exception) {
+                showErrorToast(e)
+                finish()
+                return
+            }
         }
 
         if (mPath.isEmpty()) {