[hackers] [sent] [PATCH] remove unnecessary NULL checks and add `void` for an empty parameter list

---
I sent (hehe) this a long time ago, it might be of interest now that some
work is done.
---
 sent.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)
diff --git a/sent.c b/sent.c
index 9534fcaf97b9..49853ee6c273 100644
--- a/sent.c
+++ b/sent.c
_AT_@ -99,12 +99,12 @@ static void load(FILE *fp);
 static void advance(const Arg *arg);
 static void quit(const Arg *arg);
 static void resize(int width, int height);
-static void run();
-static void usage();
-static void xdraw();
-static void xhints();
-static void xinit();
-static void xloadfonts();
+static void run(void);
+static void usage(void);
+static void xdraw(void);
+static void xhints(void);
+static void xinit(void);
+static void xloadfonts(void);
 
 static void bpress(XEvent *);
 static void cmessage(XEvent *);
_AT_@ -216,8 +216,7 @@ ffload(Slide *s)
 	s->img->bufwidth = ntohl(*(uint32_t *)&hdr[8]);
 	s->img->bufheight = ntohl(*(uint32_t *)&hdr[12]);
 
-	if (s->img->buf)
-		free(s->img->buf);
+	free(s->img->buf);
 	/* internally the image is stored in 888 format */
 	s->img->buf = ecalloc(s->img->bufwidth * s->img->bufheight, strlen("888"));
 
_AT_@ -496,7 +495,7 @@ resize(int width, int height)
 }
 
 void
-run()
+run(void)
 {
 	XEvent ev;
 
_AT_@ -518,7 +517,7 @@ run()
 }
 
 void
-xdraw()
+xdraw(void)
 {
 	unsigned int height, width, i;
 	Image *im = slides[idx].img;
_AT_@ -546,7 +545,7 @@ xdraw()
 }
 
 void
-xhints()
+xhints(void)
 {
 	XClassHint class = {.res_name = "sent", .res_class = "presenter"};
 	XWMHints wm = {.flags = InputHint, .input = True};
_AT_@ -564,7 +563,7 @@ xhints()
 }
 
 void
-xinit()
+xinit(void)
 {
 	XTextProperty prop;
 	unsigned int i;
_AT_@ -608,7 +607,7 @@ xinit()
 }
 
 void
-xloadfonts()
+xloadfonts(void)
 {
 	int i, j;
 	char *fstrs[LEN(fontfallbacks)];
_AT_@ -627,8 +626,7 @@ xloadfonts()
 	}
 
 	for (j = 0; j < LEN(fontfallbacks); j++)
-		if (fstrs[j])
-			free(fstrs[j]);
+		free(fstrs[j]);
 }
 
 void
_AT_@ -677,7 +675,7 @@ configure(XEvent *e)
 }
 
 void
-usage()
+usage(void)
 {
 	die("usage: %s [file]", argv0);
 }
-- 
2.39.0