fix some cppcheck errors and warnings in config module and T Tracer

common/config/config_cmdline.c

@@ -171,7 +171,7 @@ int config_check_unknown_cmdlineopt(char *prefix) {
     if (strcmp(prefix,CONFIG_CHECKALLSECTIONS) == 0)
       finalcheck = 1;
     else if (strlen(prefix) > 0) {
-      sprintf(testprefix,"--%s.",prefix);
+      sprintf(testprefix,"--%.*s.",CONFIG_MAXOPTLENGTH-1,prefix);
     }
   }
 

common/config/config_load_configmodule.c

@@ -345,7 +345,7 @@ void free_configmodule(void) {
 
     if( cfgptr->cfgmode != NULL) free(cfgptr->cfgmode);
 
-    printf ("[CONFIG] free %u config parameter pointers\n",cfgptr->num_cfgP);
+    printf ("[CONFIG] free %i config parameter pointers\n",cfgptr->num_cfgP);
 
     for (int i=0; i<cfgptr->num_cfgP; i++) {
       if ( cfgptr->cfgP[i] != NULL) free(cfgptr->cfgP[i]);