[libdmapsharing] README-Porting: fix typo

[W. Michael Petullo <wmpetullo src gnome org>]

commit 2d24eafaf536884e72091e71ee220500639bd6c4
Author: W. Michael Petullo <mike flyn org>
Date:   Sun Mar 17 22:07:26 2019 -0400

    README-Porting: fix typo
    
    Signed-off-by: W. Michael Petullo <mike flyn org>

 README-Porting | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/README-Porting b/README-Porting
index fcbc2b8..d3f9d99 100644
--- a/README-Porting
+++ b/README-Porting
@@ -76,7 +76,7 @@ DmapIdContainerRecordFunc.
 duplicate the passed value.  Thus the caller maintains control of the
 original value.
 
-(7)  Getting an object property using g_object_set returns a duplicate
+(7)  Getting an object property using g_object_get returns a duplicate
 of the value. Thus the caller should free or unref the obtained value.
 
 (8)  The "hash" property in the DAAPRecord interface and the "hash"