--- a/ai_pathfinder.c	Mon Jan 10 21:56:02 2005 +0000
+++ b/ai_pathfinder.c	Mon Jan 10 22:14:35 2005 +0000
@@ -189,11 +189,11 @@
        		if (!PathFinderInfo->rail_or_road && AI_PATHFINDER_IS_ROAD(current->path.node.tile + TileOffsByDir(i))) {
        			if (IS_TILETYPE(current->path.node.tile + TileOffsByDir(i), MP_TUNNELBRIDGE)) {
        				// An existing bridge... let's test the direction ;)
-       				if ((_map5[current->path.node.tile + TileOffsByDir(i)] & 1) != (i & 1)) continue;
+       				if ((_map5[current->path.node.tile + TileOffsByDir(i)] & 1U) != (i & 1)) continue;
    					// This problem only is valid for tunnels:
        				// When the last tile was not yet a tunnel, check if we enter from the right side..
        				if (!IS_TILETYPE(current->path.node.tile, MP_TUNNELBRIDGE) && (_map5[current->path.node.tile + TileOffsByDir(i)] & 0x80) == 0) {
-       					if (i != (_map5[current->path.node.tile + TileOffsByDir(i)] & 3)) continue;
+       					if (i != (_map5[current->path.node.tile + TileOffsByDir(i)] & 3U)) continue;
        				}
        			}
        		}
@@ -201,7 +201,7 @@
        		if (!PathFinderInfo->rail_or_road && AI_PATHFINDER_IS_ROAD(current->path.node.tile)) {
        			if (IS_TILETYPE(current->path.node.tile, MP_TUNNELBRIDGE)) {
        				// An existing bridge/tunnel... let's test the direction ;)
-       				if ((_map5[current->path.node.tile] & 1) != (i & 1)) continue;
+       				if ((_map5[current->path.node.tile] & 1U) != (i & 1)) continue;
        			}
        		}
 

--- a/graph_gui.c	Mon Jan 10 21:56:02 2005 +0000
+++ b/graph_gui.c	Mon Jan 10 22:14:35 2005 +0000
@@ -558,7 +558,7 @@
        				// Bah, player gone :(
                    	w->disabled_state += 1 << (i+13);
                    	// Is this player selected? If so, select first player (always save? :s)
-                   	if (w->click_state == 1 << (i+13))
+                   	if (w->click_state == 1U << (i + 13))
                    		w->click_state = 1 << 13;
                    	// We need a repaint
                    	SetWindowDirty(w);

--- a/map.h	Mon Jan 10 21:56:02 2005 +0000
+++ b/map.h	Mon Jan 10 22:14:35 2005 +0000
@@ -4,7 +4,7 @@
 #define TILE_FROM_XY(x,y) (int)((((y) >> 4) << MapLogX()) + ((x) >> 4))
 #define TILE_XY(x,y) (int)(((y) << MapLogX()) + (x))
 
-#define TILE_MASK(x) (int)((x) & ((1 << (MapLogX() + MapLogY())) - 1))
+#define TILE_MASK(x) ((x) & ((1 << (MapLogX() + MapLogY())) - 1))
 
 extern byte   _map_type_and_height[];
 extern byte   _map5[];

--- a/pathfind.c	Mon Jan 10 21:56:02 2005 +0000
+++ b/pathfind.c	Mon Jan 10 22:14:35 2005 +0000
@@ -450,7 +450,7 @@
 	HashLink *new_link;
 	uint num_links_left;
 
-	int nstack;
+	uint nstack;
 	StackedItem stack[256]; // priority queue of stacked items
 
 	uint16 hash_head[0x400]; // hash heads. 0 means unused. 0xFFC0 = length, 0x3F = type
@@ -484,7 +484,10 @@
 {
 	StackedItem si;
 	int i = 1, j;
-	int n = --tpf->nstack;
+	int n;
+
+	assert(tpf->nstack > 0);
+	n = --tpf->nstack;
 
 	if (n == 0) return; // heap is empty so nothing to do?
 

--- a/viewport.c	Mon Jan 10 21:56:02 2005 +0000
+++ b/viewport.c	Mon Jan 10 22:14:35 2005 +0000
@@ -1186,7 +1186,7 @@
 
 	// This assert should never happen (because the length of the parent_list
 	//  is checked)
-	assert(vd.parent_list - parent_list <= lengthof(parent_list));
+	assert(vd.parent_list <= endof(parent_list));
 
 	if (vd.first_tile != NULL)
 		ViewportDrawTileSprites(vd.first_tile);