[PATCH] RegisterTypeLib: only cut off non-empty \[0-9]+$ resource-id

[Puetz Kevin A]

Fixes mis-applied patch in 5ecd6e4807d4b145a06e653dc1bb2f16678d0c14

The check was mistakenly changed to check file_name[0] when merging.
The original intent was that since wcsrchr returns a pointer to the '\\',
if (file_name != NULL), we already know file_name[0] != '\0' because '\\'!='\0'

The check was intentionally whether the *next* character, file_name[1], was '\0',
i.e. whether szFullPath ended with '\\' (was explicitly a directory).

Passing a directory is incorrect input (szFullPath should be a .tlb file),
but for quality-of-implemnentation it still seems wrong to have this remove
two path elements, e.g. currently "path\\to\\" truncates to "path\\to"
as if the last "\\" delimited a resource id, then splits the filename
yielding szHelpDir == "path" and file_name == "to",
rather than szHelpDir=="path\\to" and file_name == "" as seems intended
(and as the originally-submitted patch would have).

Signed-off-by: Kevin Puetz <PuetzKevinA at JohnDeere.com>
---
 dlls/oleaut32/typelib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/oleaut32/typelib.c b/dlls/oleaut32/typelib.c
index 01bb16efbc..06667850a3 100644
--- a/dlls/oleaut32/typelib.c
+++ b/dlls/oleaut32/typelib.c
@@ -730,7 +730,7 @@ HRESULT WINAPI RegisterTypeLib(ITypeLib *ptlib, const WCHAR *szFullPath, const W
             if ((disposition == REG_CREATED_NEW_KEY) && (szHelpDir == NULL)) {
                 szHelpDir = freeHelpDir = SysAllocString(szFullPath);
                 file_name = wcsrchr(szHelpDir, '\\');
-                if (file_name && file_name[0]) {
+                if (file_name && file_name[1]) {
                     /* possible remove a numeric \index (resource-id) */
                     WCHAR *end_ptr = file_name + 1;
                     while ('0' <= *end_ptr && *end_ptr <= '9') end_ptr++;