kernel32: MultiByteToWideChar: MB_USEGLYPHCHARS & incorrect GetLastError() codes fix

[Kirill K. Smirnov]

+/* 0x00..0x1f chars glyph map */
+static const WCHAR glyph_xlat[32] = {
+    0x0000, 0x263A, 0x263B, 0x2665, 0x2666, 0x2663, 0x2662, 0x2219,
+    0x25D8, 0x25CB, 0x25D9, 0x2642, 0x2640, 0x266A, 0x266B, 0x263C,
+    0x25BA, 0x25C4, 0x2195, 0x203C, 0x00B6, 0x00A7, 0x25AC, 0x21A8,
+    0x2191, 0x2193, 0x2192, 0x2190, 0x221F, 0x2194, 0x25B2, 0x25BC
+};
+
+/* adds glyphs to the string */
+static inline void add_glyphs( WCHAR *str, unsigned int length )
+{
+    unsigned int i;
+    for (i=0; i!=length; i++) {
+	if (str[i]<0x20) str[i]=glyph_xlat[str[i]];
+    }
+}

I propose to make this routine extern, because it is the simpliest way to make 
console renderer (I mean user backend of wineconsole) display the characters 
below 0x20 correct.

The test:
#include <windows.h>

int main(void)
{
    DWORD d;
    char str[32];
    int i;

    GetConsoleMode(GetStdHandle(STD_OUTPUT_HANDLE), &d);
    d &= ~ENABLE_PROCESSED_OUTPUT;
    SetConsoleMode(GetStdHandle(STD_OUTPUT_HANDLE), d);
    for (i = 0; i < 32; i++) str[i] = i;
    WriteConsoleA(GetStdHandle(STD_OUTPUT_HANDLE), str, 32, &d, 0);
    d |= ENABLE_PROCESSED_OUTPUT;
    SetConsoleMode(GetStdHandle(STD_OUTPUT_HANDLE), d);
    return 0;
}

Under wine we get strange symbols, under windows we get correct glyphs.

If we perform the same character conversion in wineconsole/user.c just before 
actual text output, we get almost the same result that Windows does. The only 
difference is handling \0 symbol.

--
Kirill