win32-console-wrapper: simplify error printing

No need for pointless prefix, print error directly. Don't use CRT
function. This will write only to console, but it's not meant to be
written to file anyway.

osdep/win32-console-wrapper.c

@@ -24,18 +24,19 @@
 
 int wmain(int argc, wchar_t **argv, wchar_t **envp);
 
-static void cr_perror(const wchar_t *prefix)
+static void cr_perror(void)
 {
-    wchar_t *error;
+    LPWSTR error = NULL;
+    DWORD len = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                               FORMAT_MESSAGE_FROM_SYSTEM |
+                               FORMAT_MESSAGE_IGNORE_INSERTS,
+                               NULL, GetLastError(),
+                               LANG_USER_DEFAULT,
+                               (LPWSTR)&error, 0, NULL);
 
-    FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
-                   FORMAT_MESSAGE_FROM_SYSTEM |
-                   FORMAT_MESSAGE_IGNORE_INSERTS,
-                   NULL, GetLastError(),
-                   MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                   (LPWSTR)&error, 0, NULL);
-
-    fwprintf(stderr, L"%ls: %ls", prefix, error);
+    HANDLE out = GetStdHandle(STD_ERROR_HANDLE);
+    if (out != INVALID_HANDLE_VALUE && GetConsoleMode(out, &(DWORD){0}))
+        WriteConsoleW(out, error, len, NULL, NULL);
     LocalFree(error);
 }
 
@@ -66,10 +67,8 @@ static int cr_runproc(wchar_t *name, wchar_t *cmdline)
     };
     si.dwFlags = (si.hStdInput || si.hStdOutput || si.hStdError) ? STARTF_USESTDHANDLES : 0;
     PROCESS_INFORMATION pi = {0};
-    if (!CreateProcessW(name, cmdline, NULL, NULL, TRUE, 0,
-                        NULL, NULL, &si, &pi)) {
-
-        cr_perror(L"CreateProcess");
+    if (!CreateProcessW(name, cmdline, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) {
+        cr_perror();
     } else {
         WaitForSingleObject(pi.hProcess, INFINITE);
         GetExitCodeProcess(pi.hProcess, &retval);