attempted typecase to silence the MIPSpro warning:

cc-1506 cc: REMARK File = ../../curl/ares/ares__read_line.c, Line = 46
There is an implicit conversion from "unsigned long" to "int"; rounding, sign
extension, or loss of accuracy may result.

if (!fgets(*buf + offset, *bufsize - offset, fp))

ares__read_line.c

@@ -43,7 +43,7 @@ int ares__read_line(FILE *fp, char **buf, int *bufsize)
 
   while (1)
     {
-      if (!fgets(*buf + offset, *bufsize - offset, fp))
+      if (!fgets(*buf + offset, *bufsize - (int)offset, fp))
 	return (offset != 0) ? 0 : (ferror(fp)) ? ARES_EFILE : ARES_EOF;
       len = offset + strlen(*buf + offset);
       if ((*buf)[len - 1] == '\n')