(svn r3555) -Codechange: [Big Endian] removed defining OTTD_ALIGNMENT by default on Big Endian CPUs

this increased speed when reading unaligned data (like strings)
	test showed this to increase speed by 5,6% when drawing the mini map on PPC OSX

	the tradeoff is that now it will crash if a Big Endian computer don't support unaligned reading
	but it should easily fixable in stdafx.h if it turns out to be a problem

stdafx.h

@@ -201,7 +201,6 @@ typedef unsigned char byte;
 
 // Setup alignment and conversion macros
 #if defined(TTD_BIG_ENDIAN)
-# define OTTD_ALIGNMENT
   static inline uint32 TO_LE32(uint32 x) { return BSWAP32(x); }
   static inline uint16 TO_LE16(uint16 x) { return BSWAP16(x); }
   static inline uint32 FROM_LE32(uint32 x) { return BSWAP32(x); }