Fix for minimal mountain height drawing.

Atari/gr_basics.asm

@@ -239,7 +239,10 @@ MinCalculated
     lda xdraw
     and #%00000111	; only every 8th pixel
     bne NotFillBytes
-    ; A=0 is here
+    lda temp2
+    cmp #screenheight+1   ; only if minimum is not miniminimum :)
+    beq NotFillBytes
+    
     dec ydraw   ; protection if temp2=screenheight
 @   lda #0
     sta (xbyte),y

C64/gr_basics.asm

@@ -247,7 +247,10 @@ MinCalculated
     lda xdraw
     and #%00000111	; only every 8th pixel
     bne NotFillBytes
-    ; A=0 is here
+    lda temp2
+    cmp #screenheight+1   ; only if minimum is not miniminimum :)
+    beq NotFillBytes
+    
     dec ydraw   ; protection if temp2=screenheight
 @   lda #0
     tay

grafproc.asm

@@ -1539,9 +1539,10 @@ EndDrawing
     rts
 .endp
 
+
 /* 
 ;--------------------------------------------------
-.proc calculatemountains0
+.proc calculatemountains
 ; Only for testing - makes ground flat (0 pixels)
 ; and places tanks on it
 ; remember to remove in final compilation :)
@@ -1555,6 +1556,13 @@ nextPointDrawing
     inw xdraw
     cpw xdraw #screenwidth
     bne nextPointDrawing
+    ; 20 first points - max height!
+    mwa #mountaintable modify
+    ldy #20
+    lda #0
+@   sta (modify),y
+    dey
+    bpl @-
     ldx NumberOfPlayers
     dex
 SetYofNextTank