Load null bytes as whitespace.

A few lines down in this file, there is a while() loop that removes all trailing spaces to replace them with null bytes, so "SUPER MARIO 64      " becomes "SUPER MARIO 64", whether or not we converted null bytes to spaces.  Also, the null byte is not documented to be a valid character for game developers to use in their ROM headers, even though for a few ROMs this is being done anyway.

Source/Glide64/Main.cpp

@@ -1737,6 +1737,8 @@ void CALL RomOpen (void)
     const char invalid_ch = '?'; /* Some Japanese games use wide chars. */
 
     ch = (char)gfx.HEADER[(32 + i) ^ 3];
+    if (ch == '\0')
+      ch = ' ';
     if (ch < ' ')
       ch = invalid_ch;
     if (ch > '~')