AK: Make checked division also check for divide by zero

Author: https://github.com/alimpfard
Commit: 6cd9906f60
Pull-request: https://github.com/SerenityOS/serenity/pull/7670

AK/Checked.h

@@ -190,6 +190,10 @@ public:
                 return;
             }
         }
+        if (other == 0) {
+            m_overflow = true;
+            return;
+        }
         m_value /= other;
     }