Avoid strcpy of overlapping strings.

The source and destination for strcpy must not overlap, and failure to
ensure that's true causes a crash on OS X. memmove does not have such a
restriction.

src/rtodms.c

@@ -63,7 +63,7 @@ rtodms(char *s, double r, int pos, int neg) {
 		if (*p != '.')
 			++p;
 		if (++q != p)
-			(void)strcpy(p, q);
+			(void)memmove(p, q, (sign ? 3 : 2));
 	} else if (min)
 		(void)sprintf(ss,"%dd%d'%c",deg,min,sign);
 	else