Compare the 'wide' bytes to null. (VirusTotal#831)

Author: wxsBSD

libyara/scan.c

@@ -114,7 +114,7 @@ static int _yr_scan_wcompare(
   if (data_size < string_length * 2)
     return 0;
 
-  while (i < string_length && *s1 == *s2)
+  while (i < string_length && *s1 == *s2 && *(s1 + 1) == 0x00)
   {
     s1+=2;
     s2++;