quick & dirty patch for smap to compile with reentrant ncurses

Smap seems to be ok with this. The proper approach would be to root out
all usage of the global COLS and LINES and switch to local variables,
as section 'Some Notes of Caution' of the ncurses intro suggests.

src/smap/smap.c

@@ -184,13 +184,11 @@ int main(int argc, char *argv[])
 
 		if (params.cluster_dims == 4) {
 			startx = width;
-			COLS -= 2;
-			width = COLS - width;
+			width = COLS - width - 2;
 			height = LINES;
 		} else if (params.cluster_dims == 3) {
 			startx = width;
-			COLS -= 2;
-			width = COLS - width;
+			width = COLS - width - 2;
 			height = LINES;
 		} else {
 			startx = 0;
@@ -476,11 +474,8 @@ static void *_resize_handler(int sig)
 	delwin(text_win);
 
 	endwin();
-	COLS = 0;
-	LINES = 0;
 	initscr();
 	doupdate();	/* update now to make sure we get the new size */
-	getmaxyx(stdscr, LINES, COLS);
 
 	if (params.cluster_dims == 4) {
 		height = dim_size[2] * dim_size[3] + dim_size[2] + 3;
@@ -508,13 +503,11 @@ static void *_resize_handler(int sig)
 
 	if (params.cluster_dims == 4) {
 		startx = width;
-		COLS -= 2;
-		width = COLS - width;
+		width = COLS - width - 2;
 		height = LINES;
 	} else if (params.cluster_dims == 3) {
 		startx = width;
-		COLS -= 2;
-		width = COLS - width;
+		width = COLS - width - 2;
 		height = LINES;
 	} else {
 		startx = 0;