Defines starting with `h' in 321/client

• hu_clip_maxs 321/client/asm_i386.h:34
• hu_clip_mins 321/client/asm_i386.h:33
• hu_clipnodes 321/client/asm_i386.h:29
• hu_firstclipnode 321/client/asm_i386.h:31
• hu_lastclipnode 321/client/asm_i386.h:32
• hu_planes 321/client/asm_i386.h:30
• hu_size 321/client/asm_i386.h:35