let test_ast compile again

Makefile

@@ -20,10 +20,11 @@ OBJ     = \
           util.o      \
           code.o      \
           ast.o       \
-          ir.o
+          ir.o        \
+          error.o
 OBJ_A = test/ast-test.o
 OBJ_I = test/ir-test.o
-OBJ_C = main.o lexer.o parser.o error.o
+OBJ_C = main.o lexer.o parser.o
 OBJ_X = exec-standalone.o util.o
 
 #default is compiler only

test/ast-test.c

@@ -21,6 +21,7 @@ const char *opts_output   = "progs.dat";
 int         opts_standard = COMPILER_GMQCC;
 bool        opts_debug    = false;
 bool        opts_memchk   = false;
+bool        opts_werror   = false;
 
 #include "ast-macros.h"