atl100: ReadFile doesn't directly return an error code.

dlls/atl100/registrar.c

@@ -495,15 +495,13 @@ static HRESULT file_register(Registrar *This, LPCOLESTR fileName, BOOL do_regist
     DWORD filelen, len;
     LPWSTR regstrw;
     LPSTR regstra;
-    LRESULT lres;
     HRESULT hres;
 
     file = CreateFileW(fileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     if(file != INVALID_HANDLE_VALUE) {
         filelen = GetFileSize(file, NULL);
         regstra = HeapAlloc(GetProcessHeap(), 0, filelen);
-        lres = ReadFile(file, regstra, filelen, NULL, NULL);
-        if(lres == ERROR_SUCCESS) {
+        if(ReadFile(file, regstra, filelen, NULL, NULL)) {
             len = MultiByteToWideChar(CP_ACP, 0, regstra, filelen, NULL, 0)+1;
             regstrw = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len*sizeof(WCHAR));
             MultiByteToWideChar(CP_ACP, 0, regstra, filelen, regstrw, len);
@@ -514,7 +512,7 @@ static HRESULT file_register(Registrar *This, LPCOLESTR fileName, BOOL do_regist
             HeapFree(GetProcessHeap(), 0, regstrw);
         }else {
             WARN("Failed to read faile\n");
-            hres = HRESULT_FROM_WIN32(lres);
+            hres = HRESULT_FROM_WIN32(GetLastError());
         }
         HeapFree(GetProcessHeap(), 0, regstra);
         CloseHandle(file);