bugfix: app would start even with empty config params

src/brovski-adress-etiketten-verwaltung.py

@@ -252,6 +252,8 @@ class Application:
         try:
             self.json_path = self.config.get("json", "path")
             self.csv_path = self.config.get("csv", "path")
+            if self.json_path == "" or self.csv_path == "":
+                raise ValueError("Empty JSON or CSV path")
             self.config_good = True
         except NoSectionError:
             self.show_config_error()
@@ -259,6 +261,9 @@ class Application:
         except NoOptionError:
             self.show_config_error()
             self.show_settings()
+        except ValueError:
+            self.show_config_error()
+            self.show_settings()
 
     def show_config_error(self):
         show_error(message_title="Fehlerhafte Konfiguration",