maintainer-feedback requested: [Bug 239123] sysutils/xfce4-cpugraph-plugin: fix build on GCC architectures

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Bug 239123: sysutils/xfce4-cpugraph-plugin: fix build on GCC architectures
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239123



--- Description ---
After last update this port needs USE_CSTD=c99 to build with base GCC:
cpu.c:573: error: 'for' loop initial declaration used outside C99 mode
cpu.c: In function 'set_color':
cpu.c:592: warning: 'gtk_widget_override_background_color' is deprecated
(declared at /usr/local/include/gtk-3.0/gtk/gtkwidget.h:1150)
cpu.c:593: warning: 'gtk_widget_override_background_color' is deprecated
(declared at /usr/local/include/gtk-3.0/gtk/gtkwidget.h:1150)