diff --git a/polymer/eduke32/build/src/build.c b/polymer/eduke32/build/src/build.c
index 06995f4dd..b81192d13 100644
--- a/polymer/eduke32/build/src/build.c
+++ b/polymer/eduke32/build/src/build.c
@@ -6502,8 +6502,6 @@ end_join_sectors:
                                     if (wall[k].x==wall[numwalls].x && wall[k].y==wall[numwalls].y)
                                     {
                                         YAX_SKIPWALL(k);
-                                        if (wall[k].nextwall >= 0)
-                                            YAX_SKIPWALL(wall[k].nextwall);
 
                                         m = k;
                                         break;
diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 742d023b3..dcf49dfb2 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -13248,7 +13248,7 @@ static void FuncMenu(void)
                 if (editval)
                 {
                     j=getnumber16("Percentage of original:    ",100,1000,0);
-                    if (j!=100)
+                    if (j!=100 && j!=0)
                     {
                         int32_t w, currsector, start_wall, end_wall;
                         double size = (j/100.f);
@@ -13289,7 +13289,7 @@ static void FuncMenu(void)
                 if (editval)
                 {
                     j=getnumber16("Shade divisor:    ",1,128,1);
-                    if (j!=1)
+                    if (j > 1)
                     {
                         for (i=0; i<numsectors; i++)
                         {
@@ -13312,7 +13312,7 @@ static void FuncMenu(void)
                 if (editval)
                 {
                     j=getnumber16("Visibility divisor:    ",1,128,0);
-                    if (j!=1)
+                    if (j > 1)
                     {
                         for (i=0; i<numsectors; i++)
                         {