The source project of this merge request has been removed.
gstvalue: fix compilation warning in GST_VALUE_HOLDS macros
GST_VALUE_HOLDS_... macros may cause -Waddress warning on gcc if GValue is allocated on stack:
gstvalue.h:145:46: warning: the comparison will always evaluate as ‘true’ for the address of ‘v’ will never be NULL [-Waddress]
#define GST_VALUE_HOLDS_CAPS(x) ((x) != NULL && G_VALUE_TYPE(x) == _gst_caps_type)