commit 0614ae8

pen size safety + some debug

 1@@ -109,11 +109,18 @@ int main(void)
 2 					XCopyArea(d,p,w,gc,0,0,wi,hi,0,0);
 3 					XSetForeground(d, gc, BlackPixel(d,s));
 4 				}
 5-				if (k==XK_e) er=!er;
 6-				if (k==XK_i) z+=5;
 7-				if (k==XK_o) z-=5;
 8+				if (k==XK_e) {
 9+					er=!er;
10+					printf("er=%s\n", er ? "true" : "false");
11+				}
12+
13+
14+				if (k==XK_i) z= z<=1 ? z+4 : z+5;
15+				if (k==XK_o) z= z>6  ? (z-5) : 1;
16 				if (k==XK_p) z=20;
17 
18+				if (k==XK_i||k==XK_o||k==XK_p) printf("z=%d\n", z);
19+
20 				break;
21 			}
22 		}