updated for version 7.4.568
Problem:    Giving an error for ":0wincmd w" is a problem for some plugins.
Solution:   Allow the zero in the range. (Marcin Szamotulski)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 3276abf..c36f407 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -4686,8 +4686,7 @@
 		    return (char_u *)_(e_invrange);
 		break;
 	    case ADDR_WINDOWS:
-		if (eap->line1 < 1
-			|| eap->line2 > LAST_WIN_NR)
+		if (eap->line2 > LAST_WIN_NR)
 		    return (char_u *)_(e_invrange);
 		break;
 	    case ADDR_TABS: