Use our CURL_LLONG_MAX and CURL_LLONG_MIN which are defined with the proper suffix.

src/main.c

@@ -1388,20 +1388,8 @@ static int str2num(long *val, const char *str)
 static int str2offset(curl_off_t *val, const char *str)
 {
 #if (CURL_SIZEOF_CURL_OFF_T > CURL_SIZEOF_LONG)
-  /* Ugly, but without going through a bunch of rigmarole, we don't have the
-   * definitions for LLONG_{MIN,MAX} or LONG_LONG_{MIN,MAX}.
-   */
-#ifndef LLONG_MAX
-#  define LLONG_MAX CURL_OFF_T_C(0x7FFFFFFFFFFFFFFF)
-#  define LLONG_MIN CURL_OFF_T_C(0x8000000000000000)
-#endif
-
-  /* this is a duplicate of the function that is also used in libcurl */
   *val = curlx_strtoofft(str, NULL, 0);
-
-  if( ( (*val == LLONG_MAX) || 
-        (*val == LLONG_MIN) ) &&
-      (ERRNO == ERANGE) )
+  if((*val == CURL_LLONG_MAX || *val == CURL_LLONG_MIN) && (ERRNO == ERANGE))
     return 1;
 #else
   *val = strtol(str, NULL, 0);