It seems some recent commit on master broke metacity build


gcc -DHAVE_CONFIG_H -I. -I.. -I./include -DMETACITY_LIBEXECDIR=\"/opt/gnome3/libexec\" -DHOST_ALIAS=\"\" -DMETACITY_LOCALEDIR=\"/opt/gnome3/share/locale\" -DMETACITY_PKGDATADIR=\"/opt/gnome3/share/metacity\" -DMETACITY_DATADIR=\"/opt/gnome3/share\" -DG_LOG_DOMAIN=\"metacity\" -DSN_API_NOT_YET_FROZEN=1 -pthread -DORBIT2=1 -D_REENTRANT -I/opt/gnome3/include/gtk-2.0 -I/opt/gnome3/lib64/gtk-2.0/include -I/opt/gnome3/include/atk-1.0 -I/opt/gnome3/include/cairo -I/opt/gnome3/include/gdk-pixbuf-2.0 -I/opt/gnome3/include/pango-1.0 -I/opt/gnome3/include/glib-2.0 -I/opt/gnome3/lib64/glib-2.0/include -I/opt/gnome3/include/pixman-1 -I/opt/gnome3/include/gconf/2 -I/opt/gnome3/include/orbit-2.0 -I/opt/gnome3/include/startup-notification-1.0 -I/opt/gnome3/include/libgtop-2.0 -I/usr/include/freetype2 -I/usr/include/libpng12      -g -O2 -Wall -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wcast-align -Wsign-compare -Wall -ansi -Werror -MT display.o -MD -MP -MF .deps/display.Tpo -c -o display.o `test -f 'core/display.c' || echo './'`core/display.c
cc1: warnings being treated as errors
core/display.c: In function ‘process_selection_clear’:
core/display.c:4728: error: passing argument 1 of ‘meta_display_unmanage_screen’ from incompatible pointer type
core/display-private.h:333: note: expected ‘struct MetaDisplay *’ but argument is of type ‘struct MetaDisplay **’