preproc: Use found path when opening include

It's a typo in 169ac7c152ee13ed0c470ceb3371e9afb10e9a60

https://bugzilla.nasm.us/show_bug.cgi?id=3392378

Reported-by: Ryan Prichard <ryan.prichard@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

asm/preproc.c

@@ -1614,7 +1614,7 @@ static FILE *inc_fopen(const char *file,
     }
 
     if (!fp && omode != INC_PROBE)
-        fp = nasm_open_read(file, fmode);
+        fp = nasm_open_read(path, fmode);
 
     if (found_path)
         *found_path = path;