Fix "last week" patch so that it works for 0 and 5 to match documentation

src/ezTime.cpp

@@ -334,8 +334,11 @@ namespace ezt {
 		if (year <= 68 ) year = 1970 + year;		// fix user intent
 		uint8_t m = month;   
 		uint8_t w = ordinal;
-		if (w == 5) ordinal = 0;
-		if (w == 5) {			// is this a "Last week" rule?
+		if (w == 5) {	
+			ordinal = 0;
+			w = 0;
+		}
+		if (w == 0) {			// is this a "Last week" rule?
 			if (++m > 12) {		// yes, for "Last", go to the next month
 				m = 1;
 				++year;