WinHelp must accept a NULL pointer to the help key string.

ba2c8d49 · Rein Klazes · Alexandre Julliard · 68e0d64d · ba2c8d49
Commit ba2c8d49 authored Apr 29, 2000 by Rein Klazes Committed by Alexandre Julliard Apr 29, 2000
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winhelp.c windows/winhelp.c +1 -1

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--- a/windows/winhelp.c
+++ b/windows/winhelp.c
@@ -87,7 +87,7 @@ BOOL WINAPI WinHelpA( HWND hWnd, LPCSTR lpHelpFile, UINT wCommand,
 		case HELP_KEY:
 		case HELP_PARTIALKEY:
 		case HELP_COMMAND:
-			dsize = strlen( (LPSTR)dwData )+1;
+			dsize = dwData ? strlen( (LPSTR)dwData )+1: 0;
 			break;
 		case HELP_MULTIKEY:
 			dsize = ((LPMULTIKEYHELP)dwData)->mkSize;