- [FIX] clip(x,y,w,h) works as expected.

- [NEW] clip() with no arguments resets clipping region.
- [FIX] cls() respects clipping region (but now it's slower)
- [FIX] pset's and pget now respect clipping region correctly

mini.h

@@ -166,6 +166,7 @@ void print(const char *str, int x, int y);
 void print(const char *str, int x, int y, uint8_t color);
 
 void clip(int x, int y, int w, int h);
+void clip();
 void camera(int x, int y);
 
 void circ(int x, int y, uint8_t r = 4);