repository: fix error handling in PlainCloneContext(). [Fixes src-d#741]

Signed-off-by: Bartek Jaroszewski <[email protected]>

Author: bjaroszewski

repository.go

@@ -368,15 +368,14 @@ func PlainCloneContext(ctx context.Context, path string, isBare bool, o *CloneOp
 		}
 		defer fh.Close()
 
-		names, err := fh.Readdirnames(1)
-		if err != nil {
-			if err == io.EOF {
-				dirEmpty = true
-			} else if len(names) != 0 {
-				return nil, ErrDirNotEmpty
-			}
+		if err != io.EOF && err != nil {
 			return nil, err
 		}
+		if len(names) == 0 {
+			dirEmpty = true
+		} else {
+			return nil, ErrDirNotEmpty
+		}
 	}
 
 	r, err := PlainInit(path, isBare)