Added new weapon jam code from SpaceViking (think that's who wrote it).

Updated the text files and moved a static phrase into the language specific files.

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@2207 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Utils/_EnglishText.cpp

@@ -4282,6 +4282,7 @@ STR16 NewInvMessage[] =
 	L"Can not move while backpack zipper active",
 	L"Are you sure you want to sell all sector items?",
 	L"Are you sure you want to delete all sector items?",
+	L"Cannot climb while wearing a backpack",
 };
 
 // WANNE - MP: Multiplayer messages