added preprocessor constant for undefined string parameter

diff --git a/src/libgame/system.h b/src/libgame/system.h
index 082fc252cee7b33286944fa5d36b126c629fc9f8..06f49afaa59f96ad55991955757f5c3df5748ce6 100644 (file)
--- a/src/libgame/system.h
+++ b/src/libgame/system.h
@@ -633,10 +633,13 @@
 // default value for undefined password
 #define UNDEFINED_PASSWORD     "[undefined]"
 
-// default value for undefined parameter
+// default value for undefined string parameter
+#define ARG_UNDEFINED_STRING   "[undefined]"
+
+// default value for default string parameter
 #define ARG_DEFAULT            "[DEFAULT]"
 
-// default values for undefined configuration file parameters
+// default values for undefined numerical parameter (as string and integer)
 #define ARG_UNDEFINED          "-1000000"
 #define ARG_UNDEFINED_VALUE    (-1000000)