[SERVICES] RChangeServiceConfig2A(): Zero-Initialize InfoW variable

This lets forward NULL Info.psd/Info.psd->lpDescription/Info.psfa,
instead of an uninitialized value.

CORE-14521

Author: SergeGautherie

base/system/services/rpcserver.c

@@ -5103,7 +5103,7 @@ RChangeServiceConfig2A(
     SC_RPC_HANDLE hService,
     SC_RPC_CONFIG_INFOA Info)
 {
-    SC_RPC_CONFIG_INFOW InfoW;
+    SC_RPC_CONFIG_INFOW InfoW = { 0 };
     DWORD dwRet, dwLength;
     PVOID ptr = NULL;