upload: still upload files collected before a walk error

A walk that aborts partway used to leave the already-uploaded files
behind; collecting paths first must not drop them, so upload what was
gathered and still exit non-zero.

weed/command/upload.go

@@ -106,7 +106,6 @@ func runUpload(cmd *Command, args []string) bool {
 		})
 		if err != nil {
 			fmt.Println(err.Error())
-			return false
 		}
 
 		concurrency := *upload.concurrency
@@ -172,6 +171,9 @@ func runUpload(cmd *Command, args []string) bool {
 		if <-printDone {
 			return false
 		}
+		if err != nil {
+			return false
+		}
 	} else {
 		parts, e := operation.NewFileParts(args)
 		if e != nil {