Added a new slurring variable, and set it up in the right places

code/setup.dm

@@ -221,6 +221,7 @@ var/list/global_mutations = list() // list of hidden mutation things
 #define PARALYZE "paralize"
 #define IRRADIATE "irradiate"
 #define STUTTER "stutter"
+#define SLUR "slur"
 #define EYE_BLUR "eye_blur"
 #define DROWSY "drowsy"
 
@@ -230,4 +231,4 @@ var/static/list/scarySounds = list('thudswoosh.ogg','Taser.ogg','armbomb.ogg','h
 #define SEC_LEVEL_GREEN 0
 #define SEC_LEVEL_BLUE 1
 #define SEC_LEVEL_RED 2
-#define SEC_LEVEL_DELTA 3
+#define SEC_LEVEL_DELTA 3