wininet: Rename WININET_strdup_WtoA to heap_strdupWtoA.

dlls/wininet/ftp.c

@@ -2609,7 +2609,7 @@ static BOOL FTP_SendCommand(INT nSocket, FTP_COMMAND ftpCmd, LPCWSTR lpszParam,
 	INTERNET_STATUS_CALLBACK lpfnStatusCB, object_header_t *hdr, DWORD_PTR dwContext)
 {
     BOOL ret;
-    LPSTR lpszParamA = lpszParam?WININET_strdup_WtoA(lpszParam):NULL;
+    LPSTR lpszParamA = heap_strdupWtoA(lpszParam);
     ret = FTP_SendCommandA(nSocket, ftpCmd, lpszParamA, lpfnStatusCB, hdr, dwContext);
     HeapFree(GetProcessHeap(), 0, lpszParamA);
     return ret;

dlls/wininet/internet.h

@@ -87,12 +87,17 @@ static inline WCHAR *heap_strdupAtoW(const char *str)
     return ret;
 }
 
-static inline LPSTR WININET_strdup_WtoA( LPCWSTR str )
+static inline char *heap_strdupWtoA(LPCWSTR str)
 {
-    int len = WideCharToMultiByte( CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);
-    LPSTR ret = HeapAlloc( GetProcessHeap(), 0, len );
-    if (ret)
-        WideCharToMultiByte( CP_ACP, 0, str, -1, ret, len, NULL, NULL);
+    char *ret = NULL;
+
+    if(str) {
+        DWORD size = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);
+        ret = HeapAlloc(GetProcessHeap(), 0, size);
+        if(ret)
+            WideCharToMultiByte(CP_ACP, 0, str, -1, ret, size, NULL, NULL);
+    }
+
     return ret;
 }
 

dlls/wininet/utility.c

@@ -324,7 +324,7 @@ VOID INTERNET_SendCallback(object_header_t *hdr, DWORD_PTR dwContext,
             break;
         case INTERNET_STATUS_RESOLVING_NAME:
         case INTERNET_STATUS_REDIRECT:
-            lpvNewInfo = WININET_strdup_WtoA(lpvStatusInfo);
+            lpvNewInfo = heap_strdupWtoA(lpvStatusInfo);
             break;
         }
     }