Bug fix for Windows backend from Michael Beck:

It seems that Windows returns ERROR_PATH_NOT_FOUND for CreateFile()
if the path component of a file path does not exists rather than
ERROR_FILE_NOT_FOUND.  Because libzip maps only the latter, generic
ZIP_ER_READ was returned before.

lib/zip_source_win32handle.c

diff --git a/lib/zip_source_win32handle.c b/lib/zip_source_win32handle.c
index 35e2e67..7fe003d 100644
--- a/lib/zip_source_win32handle.c
+++ b/lib/zip_source_win32handle.c
@@ -344,9 +344,12 @@
 	    }
 	    else {
 		h = ctx->ops->op_open(ctx);
-		if (h == INVALID_HANDLE_VALUE && GetLastError() == ERROR_FILE_NOT_FOUND) {
-		    zip_error_set(&ctx->error, ZIP_ER_READ, ENOENT);
-		    return -1;
+		if (h == INVALID_HANDLE_VALUE) {
+		    win32err = GetLastError();
+		    if (win32err == ERROR_FILE_NOT_FOUND || win32err == ERROR_PATH_NOT_FOUND) {
+		        zip_error_set(&ctx->error, ZIP_ER_READ, ENOENT);
+		        return -1;
+		    }
 		}
 	    }