[monitoring-plugins] Remove hacky DBL_MAX and use float.h instead

[RincewindsHat]

 Module: monitoring-plugins
 Branch: check_icmp-compiler_warnings
 Commit: b0115b2b92fb4a2ba2d844ee867bacf77e518d66
 Author: RincewindsHat <12514511+RincewindsHat at users.noreply.github.com>
   Date: Sat Mar 26 13:47:20 2022 +0100
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=b0115b2

Remove hacky DBL_MAX and use float.h instead

---

 plugins-root/check_icmp.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/plugins-root/check_icmp.c b/plugins-root/check_icmp.c
index 6119823..1b6a5e1 100644
--- a/plugins-root/check_icmp.c
+++ b/plugins-root/check_icmp.c
@@ -63,6 +63,7 @@ const char *email = "devel at monitoring-plugins.org";
 #include <netinet/ip_icmp.h>
 #include <netinet/icmp6.h>
 #include <arpa/inet.h>
+#include <float.h>
 
 
 /** sometimes undefined system macros (quite a few, actually) **/
@@ -95,10 +96,6 @@ const char *email = "devel at monitoring-plugins.org";
 # define ICMP_UNREACH_PRECEDENCE_CUTOFF 15
 #endif
 
-#ifndef DBL_MAX
-# define DBL_MAX 9.9999999999e999
-#endif
-
 typedef unsigned short range_t;  /* type for get_range() -- unimplemented */
 
 typedef struct rta_host {