winetest: Clarify the 'version not present' error.

Most of the time the library is actually missing (or only available in
the wrong bitness). Show the error code to help diagnose the other
cases.

Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

programs/winetest/main.c

@@ -135,8 +135,10 @@ static char * get_file_version(char * file_name)
             heap_free(data);
         } else
             sprintf(version, "version error %u", ERROR_OUTOFMEMORY);
-    } else
-        sprintf(version, "version not present");
+    } else if (GetLastError() == ERROR_FILE_NOT_FOUND)
+        sprintf(version, "dll is missing");
+    else
+        sprintf(version, "version not present %u", GetLastError());
 
     return version;
 }