ntdll: The closing brace of a guid string is at index 37.

dlls/ntdll/rtlstr.c

@@ -1997,7 +1997,7 @@ NTSTATUS WINAPI RtlGUIDFromString(PUNICODE_STRING str, GUID* guid)
   /* Convert string: {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}
    * to memory:       DWORD... WORD WORD BYTES............
    */
-  while (i < 37)
+  while (i <= 37)
   {
     switch (i)
     {

dlls/ntdll/tests/rtlstr.c

@@ -1672,6 +1672,9 @@ static void test_RtlIntegerToChar(void)
 static const WCHAR szGuid[] = { '{','0','1','0','2','0','3','0','4','-',
   '0','5','0','6','-'  ,'0','7','0','8','-','0','9','0','A','-',
   '0','B','0','C','0','D','0','E','0','F','0','A','}','\0' };
+static const WCHAR szGuid2[] = { '{','0','1','0','2','0','3','0','4','-',
+  '0','5','0','6','-'  ,'0','7','0','8','-','0','9','0','A','-',
+  '0','B','0','C','0','D','0','E','0','F','0','A',']','\0' };
 DEFINE_GUID(IID_Endianess, 0x01020304, 0x0506, 0x0708, 0x09, 0x0A, 0x0B,
             0x0C, 0x0D, 0x0E, 0x0F, 0x0A);
 
@@ -1687,6 +1690,12 @@ static void test_RtlGUIDFromString(void)
   ret = pRtlGUIDFromString(&str, &guid);
   ok(ret == 0, "expected ret=0, got 0x%0lx\n", ret);
   ok(memcmp(&guid, &IID_Endianess, sizeof(guid)) == 0, "Endianess broken\n");
+
+  str.Length = str.MaximumLength = (sizeof(szGuid2) - 1) / sizeof(WCHAR);
+  str.Buffer = (LPWSTR)szGuid2;
+
+  ret = pRtlGUIDFromString(&str, &guid);
+  ok(ret, "expected ret!=0\n");
 }
 
 static void test_RtlStringFromGUID(void)