db_text: include header file for atoi() to avoid clang warnings

(cherry picked from commit d7c0ae494a5f1a5a8c808a4c45c9bfbbbda7388c)

modules/db_text/dbt_raw_util.c

@@ -21,6 +21,7 @@
  * 
  */
 
+#include <stdlib.h>
 #include <sys/types.h>
 #include <string.h>
 #include <regex.h>