fix(check_memory): fix warnings reported by clang

    check_memory.c:130:9: warning: Value stored to 'perfdata_memavailable_msg'
                          during its initialization is never read
                          [deadcode.DeadStores]
      130 |        *perfdata_memavailable_msg = "",
          |         ^~~~~~~~~~~~~~~~~~~~~~~~~   ~~
    check_memory.c:131:9: warning: Value stored to 'perfdata_memused_msg'
                          during its initialization is never read
                          [deadcode.DeadStores]
      131 |        *perfdata_memused_msg = "";
          |         ^~~~~~~~~~~~~~~~~~~~   ~~

Signed-off-by: Davide Madrisan <[email protected]>

plugins/check_memory.c

@@ -127,8 +127,8 @@ main (int argc, char **argv)
   char *units = NULL;
   char *status_msg, *perfdata_mem_msg,
        *perfdata_vmem_msg = "",
-       *perfdata_memavailable_msg = "",
-       *perfdata_memused_msg = "";
+       *perfdata_memavailable_msg,
+       *perfdata_memused_msg;
   float mem_percent = 0;
   thresholds *my_threshold = NULL;