Fix some crashes when running without globals and update structures.

library/Core.cpp

@@ -841,6 +841,12 @@ bool Core::loadScriptFile(color_ostream &out, string fname, bool silent)
 
 static void run_dfhack_init(color_ostream &out, Core *core)
 {
+    if (!df::global::world || !df::global::ui || !df::global::gview)
+    {
+        out.printerr("Key globals are missing, skipping loading dfhack.init.\n");
+        return;
+    }
+
     if (!core->loadScriptFile(out, "dfhack.init", true))
     {
         core->runCommand(out, "gui/no-dfhack-init");

library/lua/memscan.lua

@@ -268,7 +268,7 @@ function found_offset(name,val)
 
     if cval then
         if cval ~= val then
-            error(string.format('Mismatch with the current value: %x',val))
+            error(string.format('Mismatch with the current value: %x != %x',val,cval))
         end
     else
         dfhack.internal.setAddress(name, val)

library/modules/Gui.cpp

@@ -1310,6 +1310,9 @@ void Gui::showAutoAnnouncement(
 
 df::viewscreen *Gui::getCurViewscreen(bool skip_dismissed)
 {
+    if (!gview)
+        return NULL;
+
     df::viewscreen * ws = &gview->view;
     while (ws && ws->child)
         ws = ws->child;

library/xml

@@ -1 +1 @@
-Subproject commit e8e415684e9d8a2fdf1c69f5283889f6a2595157
+Subproject commit 996c5190247607a39da51b8b412fe11ed890d842

scripts/devel/find-offsets.lua

@@ -4,6 +4,17 @@ local utils = require 'utils'
 local ms = require 'memscan'
 local gui = require 'gui'
 
+--[[
+
+Arguments:
+
+    * global names to force finding them
+    * 'all' to force all globals
+    * 'nofeed' to block automated fake input searches
+    * 'nozoom' to disable neighboring object heuristics
+
+]]
+
 local is_known = dfhack.internal.getAddress
 
 local os_type = dfhack.getOSType()
@@ -1415,7 +1426,7 @@ local function find_process_jobs()
 Searching for process_jobs. Please do as instructed below:]],
         'int8_t',
         { 1, 0 },
-        { [1] = 'designate a building to be constructed, e.g a bed',
+        { [1] = 'designate a building to be constructed, e.g a bed or a wall',
           [0] = 'step or unpause the game to reset the flag' }
     )
     ms.found_offset('process_jobs', addr)