getatomprop: Add forward declaration

No functional changes, but for every other function we have a forward
declaration here. getatomprop should be no exception.

1 files changed, 1 insertions, 0 deletions

diff --git a/dwm.c b/dwm.c
index 41c6767d..972f2614 100644
--- a/dwm.c
+++ b/dwm.c
@@ -169,6 +169,7 @@ static void focus(Client *c);
 static void focusin(XEvent *e);
 static void focusmon(const Arg *arg);
 static void focusstack(const Arg *arg);
+static Atom getatomprop(Client *c, Atom prop);
 static int getrootptr(int *x, int *y);
 static long getstate(Window w);
 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);