Bugfix: prevent submit when both inputs hold a '-'

app/src/main/java/me/zobrist/tichucounter/MainActivity.kt

@@ -236,6 +236,7 @@ class MainActivity : AppCompatActivity() {
                 } else {
                     updateOnChange = false
                     appendToFocusedInput('-')
+                    currentRound = Round(1,1)
                 }
 
 
@@ -248,6 +249,7 @@ class MainActivity : AppCompatActivity() {
                 } else {
                     updateOnChange = false
                     appendToFocusedInput('-')
+                    currentRound = Round(1,1)
                 }
             }
         }