kernel32: Remove a 0-length read optimization from ReadFile.

dlls/kernel32/file.c

@@ -408,7 +408,6 @@ BOOL WINAPI ReadFile( HANDLE hFile, LPVOID buffer, DWORD bytesToRead,
           bytesRead, overlapped );
 
     if (bytesRead) *bytesRead = 0;  /* Do this before anything else */
-    if (!bytesToRead) return TRUE;
 
     if (is_console_handle(hFile))
     {

dlls/kernel32/tests/comm.c

@@ -2152,7 +2152,6 @@ todo_wine
                 bytes = 0xdeadbeef;
                 SetLastError(0xdeadbeef);
                 ret = ReadFile(hcom, buf, 0, &bytes, NULL);
-todo_wine
                 ok(!ret, "ReadFile should fail\n");
 todo_wine
                 ok(GetLastError() == ERROR_INVALID_PARAMETER, "expected ERROR_INVALID_PARAMETER, got %d\n", GetLastError());

dlls/kernel32/tests/mailslot.c

@@ -80,16 +80,13 @@ static int mailslot_test(void)
     count = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadFile(INVALID_HANDLE_VALUE, buffer, 0, &count, NULL);
-todo_wine
     ok(!ret, "ReadFile should fail\n");
-todo_wine
     ok(GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError());
     ok(count == 0, "expected 0, got %u\n", count);
 
     count = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadFile(hSlot, buffer, 0, &count, NULL);
-todo_wine
     ok(!ret, "ReadFile should fail\n");
 todo_wine
     ok(GetLastError() == ERROR_SEM_TIMEOUT, "wrong error %u\n", GetLastError());

dlls/kernel32/tests/pipe.c

@@ -1860,9 +1860,7 @@ static void test_readfileex_pending(void)
     num_bytes = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadFile(INVALID_HANDLE_VALUE, read_buf, 0, &num_bytes, NULL);
-todo_wine
     ok(!ret, "ReadFile should fail\n");
-todo_wine
     ok(GetLastError() == ERROR_INVALID_HANDLE, "wrong error %u\n", GetLastError());
     ok(num_bytes == 0, "expected 0, got %u\n", num_bytes);
 
@@ -1877,12 +1875,11 @@ todo_wine
 todo_wine
     ok(GetLastError() == ERROR_IO_PENDING, "expected ERROR_IO_PENDING, got %d\n", GetLastError());
     ok(num_bytes == 0, "bytes %u\n", num_bytes);
-todo_wine
     ok((NTSTATUS)overlapped.Internal == STATUS_PENDING, "expected STATUS_PENDING, got %#lx\n", overlapped.Internal);
+todo_wine
     ok(overlapped.InternalHigh == -1, "expected -1, got %lu\n", overlapped.InternalHigh);
 
     wait = WaitForSingleObject(event, 100);
-todo_wine
     ok(wait == WAIT_TIMEOUT, "WaitForSingleObject returned %x\n", wait);
 
     num_bytes = 0xdeadbeef;
@@ -1890,13 +1887,13 @@ todo_wine
     ok(ret, "WriteFile failed\n");
     ok(num_bytes == 1, "bytes %u\n", num_bytes);
 
-    wait = WaitForSingleObject(event, 0);
+    wait = WaitForSingleObject(event, 100);
+todo_wine
     ok(wait == WAIT_OBJECT_0, "WaitForSingleObject returned %x\n", wait);
 
     ok(num_bytes == 1, "bytes %u\n", num_bytes);
 todo_wine
     ok((NTSTATUS)overlapped.Internal == STATUS_SUCCESS, "expected STATUS_SUCCESS, got %#lx\n", overlapped.Internal);
-todo_wine
     ok(overlapped.InternalHigh == 0, "expected 0, got %lu\n", overlapped.InternalHigh);
 
     /* read the pending byte and clear the pipe */

dlls/ntdll/tests/file.c

@@ -1986,9 +1986,7 @@ static void test_read_write(void)
     bytes = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadFile(INVALID_HANDLE_VALUE, buf, 0, &bytes, NULL);
-todo_wine
     ok(!ret, "ReadFile should fail\n");
-todo_wine
     ok(GetLastError() == ERROR_INVALID_HANDLE, "expected ERROR_INVALID_HANDLE, got %d\n", GetLastError());
     ok(bytes == 0, "bytes %u\n", bytes);
 
@@ -2201,9 +2199,7 @@ todo_wine
     bytes = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadFile(INVALID_HANDLE_VALUE, buf, 0, &bytes, NULL);
-todo_wine
     ok(!ret, "ReadFile should fail\n");
-todo_wine
     ok(GetLastError() == ERROR_INVALID_HANDLE, "expected ERROR_INVALID_HANDLE, got %d\n", GetLastError());
     ok(bytes == 0, "bytes %u\n", bytes);
 
@@ -2220,7 +2216,6 @@ todo_wine
     ok(bytes == 0, "bytes %u\n", bytes);
 todo_wine
     ok((NTSTATUS)ovl.Internal == STATUS_SUCCESS, "expected STATUS_SUCCESS, got %#lx\n", ovl.Internal);
-todo_wine
     ok(ovl.InternalHigh == 0, "expected 0, got %lu\n", ovl.InternalHigh);
 
     bytes = 0xdeadbeef;