make develop branch same as coverity-scan.

src/os/linux/src/linuxSysPara.c

@@ -160,7 +160,7 @@ static void taosGetSystemTimezone() {
 
   /* load time zone string from /etc/timezone */
   FILE *f = fopen("/etc/timezone", "r");
-  char  buf[65] = {0};
+  char  buf[68] = {0};
   if (f != NULL) {
     int len = fread(buf, 64, 1, f);
     if(len < 64 && ferror(f)) {
@@ -170,7 +170,6 @@ static void taosGetSystemTimezone() {
     }
     
     fclose(f);
-  }
 
     char *lineEnd = strstr(buf, "\n");
     if (lineEnd != NULL) {
@@ -181,7 +180,7 @@ static void taosGetSystemTimezone() {
     if (strlen(buf) > 0) {
       setenv("TZ", buf, 1);
     }
-
+  }
   // get and set default timezone
   tzset();