diff -r 200609cedea9 -r e8beb2845f13 src/genworld_gui.cpp
--- a/src/genworld_gui.cpp	Sat May 10 02:59:52 2008 +0000
+++ b/src/genworld_gui.cpp	Sat May 10 08:58:52 2008 +0000
@@ -525,7 +525,7 @@
 			break;
 
 		case WE_ON_EDIT_TEXT:
-			if (e->we.edittext.str != NULL) {
+			if (!StrEmpty(e->we.edittext.str)) {
 				int32 value = atoi(e->we.edittext.str);
 
 				switch (WP(w, generate_d).widget_id) {
@@ -740,7 +740,7 @@
 			break;
 
 		case WE_ON_EDIT_TEXT:
-			if (e->we.edittext.str != NULL) {
+			if (!StrEmpty(e->we.edittext.str)) {
 				int32 value = atoi(e->we.edittext.str);
 
 				switch (WP(w, generate_d).widget_id) {