setupapi: Implement SetupPromptForDiskA by wrapping around W version.
diff --git a/dlls/setupapi/dialog.c b/dlls/setupapi/dialog.c
index aaa9453..21135cd 100644
--- a/dlls/setupapi/dialog.c
+++ b/dlls/setupapi/dialog.c
@@ -183,6 +183,51 @@
 }
 
 /***********************************************************************
+ *      SetupPromptForDiskA (SETUPAPI.@)
+ */
+UINT WINAPI SetupPromptForDiskA(HWND hwndParent, PCSTR DialogTitle, PCSTR DiskName,
+        PCSTR PathToSource, PCSTR FileSought, PCSTR TagFile, DWORD DiskPromptStyle,
+        PSTR PathBuffer, DWORD PathBufferSize, PDWORD PathRequiredSize)
+{
+    WCHAR *DialogTitleW, *DiskNameW, *PathToSourceW;
+    WCHAR *FileSoughtW, *TagFileW, PathBufferW[MAX_PATH];
+    UINT ret, length;
+
+    TRACE("%p, %s, %s, %s, %s, %s, 0x%08x, %p, %d, %p\n", hwndParent, debugstr_a(DialogTitle),
+          debugstr_a(DiskName), debugstr_a(PathToSource), debugstr_a(FileSought),
+          debugstr_a(TagFile), DiskPromptStyle, PathBuffer, PathBufferSize,
+          PathRequiredSize);
+
+    DialogTitleW = strdupAtoW(DialogTitle);
+    DiskNameW = strdupAtoW(DiskName);
+    PathToSourceW = strdupAtoW(PathToSource);
+    FileSoughtW = strdupAtoW(FileSought);
+    TagFileW = strdupAtoW(TagFile);
+
+    ret = SetupPromptForDiskW(hwndParent, DialogTitleW, DiskNameW, PathToSourceW,
+            FileSoughtW, TagFileW, DiskPromptStyle, PathBufferW, MAX_PATH, PathRequiredSize);
+
+    HeapFree(GetProcessHeap(), 0, DialogTitleW);
+    HeapFree(GetProcessHeap(), 0, DiskNameW);
+    HeapFree(GetProcessHeap(), 0, PathToSourceW);
+    HeapFree(GetProcessHeap(), 0, FileSoughtW);
+    HeapFree(GetProcessHeap(), 0, TagFileW);
+
+    if(ret == DPROMPT_SUCCESS)
+    {
+        length = WideCharToMultiByte(CP_ACP, 0, PathBufferW, -1, NULL, 0, NULL, NULL);
+        if(PathRequiredSize) *PathRequiredSize = length;
+        if(PathBuffer)
+        {
+            if(length > PathBufferSize)
+                return DPROMPT_BUFFERTOOSMALL;
+            WideCharToMultiByte(CP_ACP, 0, PathBufferW, -1, PathBuffer, length, NULL, NULL);
+        }
+    }
+    return ret;
+}
+
+/***********************************************************************
  *      SetupPromptForDiskW (SETUPAPI.@)
  */
 UINT WINAPI SetupPromptForDiskW(HWND hwndParent, PCWSTR DialogTitle, PCWSTR DiskName,