msvcrt: Don't forward strncat to ntdll.

dlls/msvcrt/msvcrt.spec

@@ -1428,7 +1428,7 @@
 @ cdecl strerror_s(ptr long long)
 @ cdecl strftime(str long str ptr) MSVCRT_strftime
 @ cdecl strlen(str) MSVCRT_strlen
-@ cdecl strncat(str str long) ntdll.strncat
+@ cdecl strncat(str str long) MSVCRT_strncat
 @ cdecl strncat_s(str long str long) MSVCRT_strncat_s
 @ cdecl strncmp(str str long) MSVCRT_strncmp
 @ cdecl strncpy(ptr str long) MSVCRT_strncpy

dlls/msvcrt/string.c

@@ -677,6 +677,14 @@ int CDECL MSVCRT_strncat_s( char* dst, MSVCRT_size_t elem, const char* src, MSVC
 }
 
 /*********************************************************************
+ *      strncat (MSVCRT.@)
+ */
+char* __cdecl MSVCRT_strncat(char *dst, const char *src, MSVCRT_size_t len)
+{
+    return strncat(dst, src, len);
+}
+
+/*********************************************************************
  *		strxfrm (MSVCRT.@)
  */
 MSVCRT_size_t CDECL MSVCRT_strxfrm( char *dest, const char *src, MSVCRT_size_t len )