macosx: Fix a warning in simple_prefs.

diff --git a/modules/gui/macosx/simple_prefs.m b/modules/gui/macosx/simple_prefs.m
index 4b2f2ab319d90e78e9763acc0b82f335d9555c30..c670b91a5f9d0bdaae73e091973cb0a2343199a6 100644 (file)
--- a/modules/gui/macosx/simple_prefs.m
+++ b/modules/gui/macosx/simple_prefs.m
@@ -88,7 +88,7 @@ static VLCSimplePrefs *_o_sharedInstance = nil;
     if( base )
         [o_temp_str appendString: [NSString stringWithUTF8String: base]];
     else
-        o_temp_str = _NS("Not Set");
+        o_temp_str = [NSMutableString stringWithString:_NS("Not Set")];
     return o_temp_str;
 }