updated for version 7.4.175

Problem:    When a wide library function fails, falling back to the non-wide
	    function may do the wrong thing.
Solution:   Check the platform, when the wide function is supported don't fall
	    back to the non-wide function. (Ken Takata)

Author: brammool

src/os_mswin.c

@@ -648,7 +648,7 @@ vim_stat(const char *name, struct stat *stp)
 	{
 	    n = wstat_symlink_aware(wp, (struct _stat *)stp);
 	    vim_free(wp);
-	    if (n >= 0)
+	    if (n >= 0 || g_PlatformId == VER_PLATFORM_WIN32_NT)
 		return n;
 	    /* Retry with non-wide function (for Windows 98). Can't use
 	     * GetLastError() here and it's unclear what errno gets set to if
@@ -815,8 +815,8 @@ mch_chdir(char *path)
 	{
 	    n = _wchdir(p);
 	    vim_free(p);
-	    if (n == 0)
-		return 0;
+	    if (n == 0 || g_PlatformId == VER_PLATFORM_WIN32_NT)
+		return n;
 	    /* Retry with non-wide function (for Windows 98). */
 	}
     }
@@ -1942,8 +1942,7 @@ mch_resolve_shortcut(char_u *fname)
 
 shortcut_errorw:
 		vim_free(p);
-		if (hr == S_OK)
-		    goto shortcut_end;
+		goto shortcut_end;
 	    }
 	}
 	/* Retry with non-wide function (for Windows 98). */

src/os_win32.c

@@ -2877,6 +2877,8 @@ mch_get_user_name(
 		return OK;
 	    }
 	}
+	else if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
+	    return FAIL;
 	/* Retry with non-wide function (for Windows 98). */
     }
 #endif
@@ -2917,6 +2919,8 @@ mch_get_host_name(
 		return;
 	    }
 	}
+	else if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
+	    return;
 	/* Retry with non-wide function (for Windows 98). */
     }
 #endif
@@ -2966,6 +2970,8 @@ mch_dirname(
 		return OK;
 	    }
 	}
+	else if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
+	    return FAIL;
 	/* Retry with non-wide function (for Windows 98). */
     }
 #endif
@@ -3006,7 +3012,7 @@ mch_setperm(char_u *name, long perm)
 	{
 	    n = _wchmod(p, perm);
 	    vim_free(p);
-	    if (n == -1 && GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
+	    if (n == -1 && g_PlatformId == VER_PLATFORM_WIN32_NT)
 		return FAIL;
 	    /* Retry with non-wide function (for Windows 98). */
 	}
@@ -6048,7 +6054,7 @@ mch_open(char *name, int flags, int mode)
 	{
 	    f = _wopen(wn, flags, mode);
 	    vim_free(wn);
-	    if (f >= 0)
+	    if (f >= 0 || g_PlatformId == VER_PLATFORM_WIN32_NT)
 		return f;
 	    /* Retry with non-wide function (for Windows 98). Can't use
 	     * GetLastError() here and it's unclear what errno gets set to if
@@ -6099,7 +6105,7 @@ mch_fopen(char *name, char *mode)
 	_set_fmode(oldMode);
 # endif
 
-	if (f != NULL)
+	if (f != NULL || g_PlatformId == VER_PLATFORM_WIN32_NT)
 	    return f;
 	/* Retry with non-wide function (for Windows 98). Can't use
 	 * GetLastError() here and it's unclear what errno gets set to if

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    175,
 /**/
     174,
 /**/