Fix assumed return type of MSVC

Wenfeng CAI

2018-11-13 a0b74b09a5824d50613e3b3a5590e7a9ed515716

 src/library/os/os-win.c

@@ -46,6 +46,7 @@
   UINT driveType;

   DWORD dwSize = MAX_PATH;

   char szLogicalDrives[MAX_PATH] = { 0 };

    unsigned char buf[8] = "";



   FUNCTION_RETURN return_value;

   DWORD dwResult = GetLogicalDriveStrings(dwSize, szLogicalDrives);

@@ -72,6 +73,7 @@
                     diskInfos[ndrives].id = ndrives;

                     strncpy(diskInfos[ndrives].device, volName, MAX_PATH);

                     strncpy(diskInfos[ndrives].label, FileSysName, MAX_PATH);

                            memcpy(diskInfos[ndrives].disk_sn, &buf, sizeof(buf));

                     memcpy(diskInfos[ndrives].disk_sn, &volSerial, sizeof(DWORD));

                     diskInfos[ndrives].preferred = (strncmp(szSingleDrive, "C", 1) != 0);

                  } else {

@@ -140,6 +142,7 @@
            );

      if (dwStatus != NO_ERROR) {

         free(pAdapterInfo);

            pAdapterInfo = NULL;

      }

   } while (dwStatus == ERROR_BUFFER_OVERFLOW && i-- > 0);