Fix out of array bounds errors with -O3

When compiling with -O3 gcc seems to be a lot stricter on its checks for
index out of bounds error.

Change-Id: I5a63e1db6aa2375223ff13c6352643a9804fa93d

lib/libcurses/copywin.c

@@ -118,7 +118,8 @@ int copywin(const WINDOW *srcwin, WINDOW *dstwin,
 				cc.elements = 1;
 				np = sp->nsp;
 				if (np) {
-					while (np && cc.elements <=
+					/* MINIX: off-by one error, has to be strictly less than. */
+					while (np && cc.elements <
 					    CURSES_CCHAR_MAX) {
 						cc.vals[cc.elements++] = np->ch;
 						np = np->next;