fix build with llvm22

error: incompatible pointer types passing 'long *' to parameter of type 'const time_t *' (aka 'const long long *') [-Wincompatible-pointer-types]

Index: src/server/timer.c
--- src/server/timer.c.orig
+++ src/server/timer.c
@@ -117,7 +117,7 @@ static int check_interval(
 	time_t time_now)
 {
 	char *cp;
-	long min_time;
+	time_t min_time;
 	long seconds=0;
 	char tstmp[64]="";
 	char min_time_buf[64]="";
