Fix a precedence bug.

a == b or c == d should obviously parse as (a==b) or (c==d).

c/parser.y

@@ -72,9 +72,9 @@
 %left ','
 %right "//"
 %nonassoc '=' SETPIPE SETPLUS SETMINUS SETMULT SETDIV SETDEFINEDOR
-%nonassoc EQ
 %left OR
 %left AND
+%nonassoc EQ
 %left '+' '-'
 %left '*' '/'