Declare every extern function/variable in `nsxiv.h` (#268)

with a couple exceptions as they cause too many -Wshadow warnings.

also moves the `extcmd_t` typedef on top for cosmetic purposes.

also enable `-Wmissing-prototypes` in the ci

1 files changed, 0 insertions, 2 deletions

diff --git a/window.c b/window.c
index 57245e9..69c7b66 100644
--- a/window.c
+++ b/window.c
@@ -30,8 +30,6 @@
 #include <X11/Xatom.h>
 #include <X11/Xresource.h>
 
-extern size_t get_win_title(unsigned char *, int, bool);
-
 #if HAVE_LIBFONTS
 #include "utf8.h"
 static XftFont *font;