[monitoring-plugins] Make some booleans nicer

[Lorenz Kästle]

 Module: monitoring-plugins
 Branch: check_dhcp_rogue_detection
 Commit: 103821efeba4212501475eadcc5a5e5cb2ba9e6f
 Author: Lorenz Kästle <12514511+RincewindsHat at users.noreply.github.com>
   Date: Tue Oct  3 12:25:48 2023 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=103821e

Make some booleans nicer

---

 plugins-root/check_dhcp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/plugins-root/check_dhcp.c b/plugins-root/check_dhcp.c
index ee794b4..5ba9372 100644
--- a/plugins-root/check_dhcp.c
+++ b/plugins-root/check_dhcp.c
@@ -193,8 +193,8 @@ typedef struct requested_server_struct{
 #define ETHERNET_HARDWARE_ADDRESS            1     /* used in htype field of dhcp packet */
 #define ETHERNET_HARDWARE_ADDRESS_LENGTH     6     /* length of Ethernet hardware addresses */
 
-bool unicast = 0;        /* unicast mode: mimic a DHCP relay */
-bool exclusive = 0;      /* exclusive mode aka "rogue DHCP server detection" */
+bool unicast = false;        /* unicast mode: mimic a DHCP relay */
+bool exclusive = false;      /* exclusive mode aka "rogue DHCP server detection" */
 struct in_addr my_ip;        /* our address (required for relay) */
 struct in_addr dhcp_ip;      /* server to query (if in unicast mode) */
 unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH]="";
@@ -1094,7 +1094,7 @@ int call_getopt(int argc, char **argv){
 	};
 
 	int c=0;
-	while(1){
+	while(true){
 		c=getopt_long(argc,argv,"+hVvxt:s:r:t:i:m:u",long_options,&option_index);
 
 		if(c==-1||c==EOF||c==1)