Check number of broken temperature sensors

Core/Src/Slave_Monitoring.c

@@ -78,6 +78,20 @@ uint8_t checkSlaveTimeout() {
         return 1;
       }
     }
+
+    int working_cell_temps = 0;
+    for (int i = 0; i < NUMBEROFTEMPS; i++) {
+      if (slaves[n].cellTemps[i] != 0) {
+        working_cell_temps++;
+      }
+    }
+    if (working_cell_temps < SLAVE_MIN_TEMP_SENSORS) {
+      AMSErrorHandle temperror;
+      temperror.errorcode = SLAVES_TOO_FEW_TEMPS;
+      temperror.errorarg[0] = n;
+      AMS_Error_Handler(&temperror);
+      return 1;
+    }
   }
   return 0;
 }