winhlp32: Links are clicked on WM_LBUTTONDOWN not WM_LBUTTONUP.

This behaviour was tested against native winhlp32 by pressing down the
left mouse button and holding it while over the link to avoid having
WM_LBUTTONUP sent.  I noticed that the action for clicking the link
happened right away, without waiting for me to release the mouse button.

programs/winhlp32/winhelp.c

diff --git a/programs/winhlp32/winhelp.c b/programs/winhlp32/winhelp.c
index db9769a..b042a5a 100644
--- a/programs/winhlp32/winhelp.c
+++ b/programs/winhlp32/winhelp.c
@@ -842,12 +842,7 @@
     switch (msg)
     {
     case WM_LBUTTONDOWN:
-         if ((win->current_link = WINHELP_FindLink(win, lParam)))
-             ret = TRUE;
-         break;
-
-    case WM_LBUTTONUP:
-        if ((link = WINHELP_FindLink(win, lParam)) && link == win->current_link)
+        if ((link = WINHELP_FindLink(win, lParam)))
         {
             HLPFILE_WINDOWINFO*     wi;
 
@@ -882,7 +877,6 @@
             }
             ret = TRUE;
         }
-        win->current_link = NULL;
         break;
     }
     return ret;
@@ -917,11 +911,11 @@
             (HWND)lParam == Globals.active_popup->hMainWnd ||
             GetWindow((HWND)lParam, GW_OWNER) == Globals.active_win->hMainWnd)
             break;
-    case WM_LBUTTONUP:
     case WM_LBUTTONDOWN:
-        if (WINHELP_HandleTextMouse(Globals.active_popup, msg, lParam) && msg == WM_LBUTTONDOWN)
+        if (WINHELP_HandleTextMouse(Globals.active_popup, msg, lParam))
             return FALSE;
         /* fall through */
+    case WM_LBUTTONUP:
     case WM_MBUTTONDOWN:
     case WM_RBUTTONDOWN:
     case WM_NCLBUTTONDOWN:

programs/winhlp32/winhelp.h

diff --git a/programs/winhlp32/winhelp.h b/programs/winhlp32/winhelp.h
index 407089e..994547b 100644
--- a/programs/winhlp32/winhelp.h
+++ b/programs/winhlp32/winhelp.h
@@ -90,7 +90,6 @@
     HBRUSH              hBrush;
 
     HLPFILE_WINDOWINFO* info;
-    HLPFILE_LINK*       current_link;
 
     WINHELP_PAGESET     back;
     unsigned            font_scale; /* 0 = small, 1 = normal, 2 = large */