cabinet/tests: Advance buffer by actually read bytes count.

[Dmitry Timoshkov]

In case somebody reuses this implementation somewhere else.
---
 dlls/cabinet/tests/fdi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/cabinet/tests/fdi.c b/dlls/cabinet/tests/fdi.c
index afae707..4ed967a 100644
--- a/dlls/cabinet/tests/fdi.c
+++ b/dlls/cabinet/tests/fdi.c
@@ -721,7 +721,7 @@ static UINT CDECL fdi_mem_read(INT_PTR hf, void *pv, UINT cb)
     cb_read = (available >= cb) ? cb : available;
 
     memcpy(pv, data->base + data->pos, cb_read);
-    data->pos += cb;
+    data->pos += cb_read;
 
     /*trace("mem_read(%p,%p,%u) => %u\n", hf, pv, cb, cb_read);*/
     return cb_read;
-- 
1.8.5.3