[hbelusca] 74071: [USER32]: Use RtlInitEmptyUnicodeString where needed. Fix CID 1401230 and CID 701428 in the process.

Author: hbelusca
Date: Sun Mar  5 01:20:40 2017
New Revision: 74071

URL: http://svn.reactos.org/svn/reactos?rev=74071&view=rev
Log:
[USER32]: Use RtlInitEmptyUnicodeString where needed. Fix CID 1401230 and CID 701428 in the process.

Modified:
    trunk/reactos/win32ss/user/user32/windows/class.c

Modified: trunk/reactos/win32ss/user/user32/windows/class.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/user32/windows...
==============================================================================
--- trunk/reactos/win32ss/user/user32/windows/class.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/user32/windows/class.c	[iso-8859-1] Sun Mar  5 01:20:40 2017
@@ -215,8 +215,7 @@
             {
                 if (IS_ATOM(pszClass))
                 {
-                    ClassName.Buffer = ClassNameBuf;
-                    ClassName.MaximumLength = sizeof(ClassNameBuf);
+                    RtlInitEmptyUnicodeString(&ClassName, ClassNameBuf, sizeof(ClassNameBuf));
                     if (!NtUserGetAtomName(LOWORD((DWORD_PTR)pszClass), &ClassName))
                     {
                         ERR("Error while verifying ATOM\n");
@@ -1027,8 +1026,9 @@
     UNICODE_STRING ClassName;
     int Result;

-    ClassName.MaximumLength = nMaxCount * sizeof(WCHAR);
-    ClassName.Buffer = lpClassName;
+    RtlInitEmptyUnicodeString(&ClassName,
+                              lpClassName,
+                              nMaxCount * sizeof(WCHAR));

Result = NtUserGetClassName(hWnd,
                                 FALSE,
@@ -1214,8 +1214,10 @@
   UINT  cchType)
 {
     UNICODE_STRING ClassName;
-    ClassName.MaximumLength = cchType * sizeof(WCHAR);
-    ClassName.Buffer = (PWSTR)pszType;
+
+    RtlInitEmptyUnicodeString(&ClassName,
+                              pszType,
+                              cchType * sizeof(WCHAR));

return NtUserGetClassName(hwnd,TRUE,&ClassName);
 }