msi: If the package doesn't exist, return ERROR_FILE_NOT_FOUND.

dlls/msi/package.c

@@ -892,6 +892,9 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, MSIPACKAGE **pPackage)
             if (file != szPackage)
                 DeleteFileW( file );
 
+            if (GetFileAttributesW(szPackage) == INVALID_FILE_ATTRIBUTES)
+                return ERROR_FILE_NOT_FOUND;
+
             return r;
         }
     }

dlls/msi/tests/package.c

@@ -2049,10 +2049,7 @@ static void test_msipackage(void)
 
     /* nonexistent szPackagePath */
     r = MsiOpenPackage("nonexistent", &hpack);
-    todo_wine
-    {
     ok(r == ERROR_FILE_NOT_FOUND, "Expected ERROR_FILE_NOT_FOUND, got %d\n", r);
-    }
 
     /* NULL hProduct */
     r = MsiOpenPackage(msifile, NULL);