Move defaults for some switches into a default case

This is clearly equivalent, and quiets -Wswitch-default.

Based on part of a patch by Thomas Zimmermann.

Signed-off-by: Simon McVittie <smcv@debian.org>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=98191

bus/config-parser-common.c

@@ -187,10 +187,9 @@ bus_config_parser_element_type_to_name (ElementType type)
       return "allow_anonymous";
     case ELEMENT_APPARMOR:
       return "apparmor";
+    default:
+      _dbus_assert_not_reached ("bad element type");
+      return NULL;
     }
-
-  _dbus_assert_not_reached ("bad element type");
-
-  return NULL;
 }
 

dbus/dbus-credentials.c

@@ -267,10 +267,10 @@ _dbus_credentials_include (DBusCredentials    *credentials,
       return credentials->linux_security_label != NULL;
     case DBUS_CREDENTIAL_ADT_AUDIT_DATA_ID:
       return credentials->adt_audit_data != NULL;
+    default:
+      _dbus_assert_not_reached ("Unknown credential enum value");
+      return FALSE;
     }
-
-  _dbus_assert_not_reached ("Unknown credential enum value");
-  return FALSE;
 }
 
 /**

dbus/dbus-memory.c

@@ -334,9 +334,10 @@ source_string (BlockSource source)
       return "malloc0";
     case SOURCE_REALLOC_NULL:
       return "realloc(NULL)";
+    default:
+      _dbus_assert_not_reached ("Invalid malloc block source ID");
+      return "invalid!";
     }
-  _dbus_assert_not_reached ("Invalid malloc block source ID");
-  return "invalid!";
 }
 
 static void

dbus/dbus-sysdeps-win.c

@@ -323,9 +323,10 @@ _dbus_win_error_from_last_error (void)
     case ERROR_FILE_NOT_FOUND:
     case ERROR_PATH_NOT_FOUND:
       return DBUS_ERROR_FILE_NOT_FOUND;
+
+    default:
+      return DBUS_ERROR_FAILED;
     }
-  
-  return DBUS_ERROR_FAILED;
 }
 
 

dbus/dbus-sysdeps.c

@@ -670,9 +670,9 @@ _dbus_error_from_errno (int error_number)
     case ENOENT:
       return DBUS_ERROR_FILE_NOT_FOUND;
 #endif
+    default:
+      return DBUS_ERROR_FAILED;
     }
-
-  return DBUS_ERROR_FAILED;
 }
 
 /**