Fix Car icons in menus

The DOS version loads both low and high-res car icons: one is used for in-game icons, the other for use in the menus.
On Windows, only the high res car icons are used. This causes artifacts.

src/DETHRACE/common/loading.c

@@ -505,18 +505,20 @@ br_pixelmap* LoadPixelmap(char* pName) {
         end = &pName[strlen(pName)];
     }
 
-    if ((end - pName) != 4 || memcmp(pName, "none", end - pName) != 0) {
-        PossibleService();
-        PathCat(the_path, gApplication_path, gGraf_specs[gGraf_spec_index].data_dir_name);
-        PathCat(the_path, the_path, "PIXELMAP");
+    if (end - pName == 4 && memcmp(pName, "none", end - pName) == 0) {
+        return NULL;
+    }
+
+    PossibleService();
+    PathCat(the_path, gApplication_path, gGraf_specs[gGraf_spec_index].data_dir_name);
+    PathCat(the_path, the_path, "PIXELMAP");
+    PathCat(the_path, the_path, pName);
+    AllowOpenToFail();
+    pm = DRPixelmapLoad(the_path);
+    if (pm == NULL) {
+        PathCat(the_path, gApplication_path, "PIXELMAP");
         PathCat(the_path, the_path, pName);
-        AllowOpenToFail();
         pm = DRPixelmapLoad(the_path);
-        if (pm == NULL) {
-            PathCat(the_path, gApplication_path, "PIXELMAP");
-            PathCat(the_path, the_path, pName);
-            pm = DRPixelmapLoad(the_path);
-        }
     }
     return pm;
 }

src/DETHRACE/common/netgame.c

@@ -5,6 +5,7 @@
 #include "errors.h"
 #include "globvars.h"
 #include "globvrpb.h"
+#include "grafdata.h"
 #include "graphics.h"
 #include "harness/trace.h"
 #include "loading.h"
@@ -417,12 +418,25 @@ void InitNetHeadups(void) {
     if (gDigits_pix != NULL) {
         BrMapAdd(gDigits_pix);
     }
+    /* The Windows version does not use gIcons_pix_low_res. */
+    if (gGraf_data_index != 0) {
+        SwitchToLoresMode();
+        gIcons_pix_low_res = LoadPixelmap("CARICONS.PIX");
+        SwitchToRealResolution();
+    } else {
+        gIcons_pix_low_res = gIcons_pix;
+    }
 }
 
 // IDA: void __cdecl DisposeNetHeadups()
 void DisposeNetHeadups(void) {
     LOG_TRACE("()");
 
+    /* Windows version does not use gIcons_pix_low_res. */
+    if (gIcons_pix_low_res != NULL && gIcons_pix_low_res != gIcons_pix) {
+        BrPixelmapFree(gIcons_pix_low_res);
+    }
+
     if (gIcons_pix != NULL) {
         BrMapRemove(gIcons_pix);
         BrPixelmapFree(gIcons_pix);

src/DETHRACE/common/racestrt.c

@@ -2561,10 +2561,10 @@ void NetSynchStartDraw(int pCurrent_choice, int pCurrent_mode) {
         DRPixelmapRectangleMaskedCopy(gBack_screen,
             gCurrent_graf_data->start_synch_x_0,
             gCurrent_graf_data->start_synch_top + 1 + gCurrent_graf_data->start_synch_y_pitch * i,
-            gIcons_pix,
+            gIcons_pix_low_res, /* DOS version uses low res, Windows version uses normal res */
             0,
             gNet_players[i].car_index * gCurrent_graf_data->net_head_icon_height,
-            gIcons_pix->width,
+            gIcons_pix_low_res->width, /* DOS version uses low res, Windows version uses normal res */
             gCurrent_graf_data->net_head_icon_height);
         TurnOnPaletteConversion();
         DrawAnItem__racestrt(