Nuked almost all trailing white space.

We better do this once and for all instead of cluttering all future
commits with diffs of trailing white spaces.  In the majority of cases
blank or single lines are affected and thus this change won't disturb
a git blame too much.  For future commits the pre-commit scripts
checks that this won't happen again.

include/types.h

@@ -48,7 +48,7 @@
 #undef byte	    /* maybe there is a macro with this name */
 #ifndef __riscos__
 typedef unsigned char byte;
-#else 
+#else
 /* Norcroft treats char  = unsigned char  as legal assignment
                but char* = unsigned char* as illegal assignment
    and the same applies to the signed variants as well  */