[glib] GParam: make G_PARAM_USER_MASK unsigned

[Simon McVittie <smcv src gnome org>]

commit 5e7eaaaaeead0925a9267515ad583357f44274b0
Author: Simon McVittie <smcv debian org>
Date:   Thu Dec 1 17:06:15 2016 +0000

    GParam: make G_PARAM_USER_MASK unsigned
    
    UBSan considers left-shifting a negative number to be undefined
    behaviour (per
    <http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_081.html> it is
    implementation-defined in C89, but according to
    <https://llvm.org/bugs/show_bug.cgi?id=17490> it is undefined in C99).
    
    Signed-off-by: Simon McVittie <smcv debian org>
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=775510
    Reviewed-by: Colin Walters

 gobject/gparam.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gobject/gparam.c b/gobject/gparam.c
index 472ea3d..f50793a 100644
--- a/gobject/gparam.c
+++ b/gobject/gparam.c
@@ -51,7 +51,7 @@
 
 /* --- defines --- */
 #define PARAM_FLOATING_FLAG                     0x2
-#define        G_PARAM_USER_MASK                       (~0 << G_PARAM_USER_SHIFT)
+#define        G_PARAM_USER_MASK                       (~0U << G_PARAM_USER_SHIFT)
 #define PSPEC_APPLIES_TO_VALUE(pspec, value)   (G_TYPE_CHECK_VALUE_TYPE ((value), G_PARAM_SPEC_VALUE_TYPE 
(pspec)))
 
 /* --- prototypes --- */