shell: Fix incorrect usage of the return value of StrRetToStrNW.

dlls/shell32/brsfolder.c

@@ -227,12 +227,7 @@ static BOOL GetName(LPSHELLFOLDER lpsf, LPCITEMIDLIST lpi, DWORD dwFlags, LPWSTR
 
 	TRACE("%p %p %lx %p\n", lpsf, lpi, dwFlags, lpFriendlyName);
 	if (SUCCEEDED(IShellFolder_GetDisplayNameOf(lpsf, lpi, dwFlags, &str)))
-	{
-	  if (FAILED(StrRetToStrNW(lpFriendlyName, MAX_PATH, &str, lpi)))
-	  {
-	      bSuccess = FALSE;
-	  }
-	}
+          bSuccess = StrRetToStrNW(lpFriendlyName, MAX_PATH, &str, lpi);
 	else
 	  bSuccess = FALSE;
 

dlls/shell32/pidl.c

@@ -133,7 +133,8 @@ BOOL WINAPI ILGetDisplayNameExW(LPSHELLFOLDER psf, LPCITEMIDLIST pidl, LPWSTR pa
             ret = IShellFolder_GetDisplayNameOf(lsf, pidl, flag, &strret);
             if (SUCCEEDED(ret))
             {
-                ret = StrRetToStrNW(path, MAX_PATH, &strret, pidl);
+                if(!StrRetToStrNW(path, MAX_PATH, &strret, pidl))
+                    ret = E_FAIL;
             }
         }
         else
@@ -144,7 +145,8 @@ BOOL WINAPI ILGetDisplayNameExW(LPSHELLFOLDER psf, LPCITEMIDLIST pidl, LPWSTR pa
                 ret = IShellFolder_GetDisplayNameOf(psfParent, pidllast, flag, &strret);
                 if (SUCCEEDED(ret))
                 {
-                    ret = StrRetToStrNW(path, MAX_PATH, &strret, pidllast);
+                    if(!StrRetToStrNW(path, MAX_PATH, &strret, pidllast))
+                        ret = E_FAIL;
                 }
                 IShellFolder_Release(psfParent);
             }

dlls/shell32/shlfolder.c

@@ -350,7 +350,8 @@ HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
 
 	    hr = IShellFolder_GetDisplayNameOf (psfChild, pidlNext, dwFlags, &strTemp);
 	    if (SUCCEEDED (hr)) {
-		hr = StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext);
+		if(!StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext))
+                    hr = E_FAIL;
 	    }
 	    IShellFolder_Release (psfChild);
 	}