test: fix build warnings for most tests

Let rsync.c continue to warn, it's not complete ...

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/pidfile.c

@@ -17,12 +17,16 @@ static struct stat before, after;
 
 static void sigterm_handler(int signo)
 {
+	(void)signo;
+
 	PRINT("Exiting ...\n");
 	remove(PIDFILE);
 }
 
 static void sigalrm_handler(int signo)
 {
+	(void)signo;
+
 	PRINT("Calling pidfile(%s)\n", pidfile_arg ?: "NULL");
 	if (pidfile(pidfile_arg))
 		err(1, "failed creating1 %s", pidfile_arg);

test/tempfile.c

@@ -13,24 +13,23 @@
 
 int main(void)
 {
-	int ret;
-	FILE *fp;
 	char buf[80] = "";
+	FILE *fp;
 
 	printf("Before tempfile():\n");
-	ret = system("ls -lrt " _PATH_TMP " | tail -3");
+	system("ls -lrt " _PATH_TMP " | tail -3");
 
 	fp = tempfile();
 	fail_unless(fp != NULL);
 
-	ret = fputs(READBACK, fp);
+	fputs(READBACK, fp);
 	rewind(fp);
 	if (fgets(buf, sizeof(buf), fp))
 		fprintf(stderr, "\nRead-back from tempfile: %s", buf);
 	fail_unless(!strcmp(buf, READBACK));
 
 	printf("\nAfter tempfile(), should be same list:\n");
-	ret = system("ls -lrt " _PATH_TMP " | tail -3");
+	system("ls -lrt " _PATH_TMP " | tail -3");
 
 	return fclose(fp);
 }

test/which.c

@@ -11,13 +11,13 @@ int main(void)
 	int result = 0;
 	size_t i;
 	struct tc test[] = {
-		{ "executable",      1 },
-		{ "executable -h",   1 },
-		{ "executable-link", 1 },
-		{ "regular",         0 },
-		{ "ls",              1 },
-		{ "/usr/bin/which",  1 },
-		{ NULL, 0 }
+		{ "executable",      1, 0 },
+		{ "executable -h",   1, 0 },
+		{ "executable-link", 1, 0 },
+		{ "regular",         0, 0 },
+		{ "ls",              1, 0 },
+		{ "/usr/bin/which",  1, 0 },
+		{ NULL, 0, 0 }
 	};
 
 	setenv("PATH", "data/which:/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin", 1);

test/yorn.c

@@ -4,7 +4,7 @@
 
 #include "check.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int chan[2];
 	int status;