fix PaletteFade and DrawTintRect

Author: LittlePlanetCD

Nexus/Drawing.cpp

@@ -1634,7 +1634,7 @@ void DrawTintRectangle(int XPos, int YPos, int width, int height, byte tintID)
         height += YPos;
         YPos = 0;
     }
-    if (width <= 0 || height <= 0)
+    if (width < 0 || height < 0)
         return;
 
     byte *tintTable = NULL;
@@ -1649,7 +1649,7 @@ void DrawTintRectangle(int XPos, int YPos, int width, int height, byte tintID)
     int yOffset = SCREEN_XSIZE - width;
     for (byte *pixelBufferPtr = &Engine.pixelBuffer[XPos + SCREEN_XSIZE * YPos];; pixelBufferPtr += yOffset) {
         height--;
-        if (!height)
+        if (height < 0)
             break;
         int w = width;
         while (w--) {

Nexus/Palette.cpp

@@ -43,7 +43,7 @@ void SetFade(byte r, byte g, byte b, ushort a, int start, int end)
         a = 255;
     if (end < 256)
         ++end;
-    for (int i = start; i < end; ++i) {
+    for (int i = start; i <= end; ++i) {
         byte red     = (ushort)(r * a + (0xFF - a) * palette8[i].r) >> 8;
         byte green   = (ushort)(g * a + (0xFF - a) * palette8[i].g) >> 8;
         byte blue    = (ushort)(b * a + (0xFF - a) * palette8[i].b) >> 8;