Fix steam-engine build on msvc, and add a script for listing mem ranges.

plugins/devel/steam-engine.cpp

@@ -105,7 +105,7 @@ void decrement_flow(df::coord pos, int amount)
     auto pldes = Maps::getTileDesignation(pos);
     if (!pldes) return;
 
-    int nsize = std::max(0, pldes->bits.flow_size - amount);
+    int nsize = std::max(0, int(pldes->bits.flow_size - amount));
     pldes->bits.flow_size = nsize;
     pldes->bits.flow_forbid = (nsize > 3 || pldes->bits.liquid_type == tile_liquid::Magma);
 
@@ -382,7 +382,7 @@ struct workshop_hook : df::building_workshopst {
             if (!liquid)
                 continue;
 
-            if (cnt == 0 || random() < RAND_MAX/2)
+            if (cnt == 0 || rand() < RAND_MAX/2)
             {
                 cnt++;
                 boil_unit(liquid);

scripts/devel/lsmem.lua

@@ -0,0 +1,14 @@
+-- Prints memory ranges of the process.
+
+for _,v in ipairs(dfhack.internal.getMemRanges()) do
+    local access = { '-', '-', '-', 'p' }
+    if v.read then access[1] = 'r' end
+    if v.write then access[2] = 'w' end
+    if v.execute then access[3] = 'x' end
+    if not v.valid then
+        access[4] = '?'
+    elseif v.shared then
+        access[4] = 's'
+    end
+    print(string.format('%08x-%08x %s %s', v.start_addr, v.end_addr, table.concat(access), v.name))
+end