Defines starting with `r' in heretic

• R src/am_data.h:10
• RAISESPEED src/p_pspr.c:11
• RANGECHECK src/doomdef.h:19
• REALSTACKSIZE src/i_ibm.c:1592
• REDRANGE src/am_map.h:8
• REDS src/am_map.h:7
• RESENDCOUNT src/d_net.c:32
• RIGHT_DIR src/mn_menu.c:13
• __R_LOCAL__ src/r_local.h:4