Everything except report.c compiles.

Not that I'm not claiming that it works.

src/bind_unit.c

@@ -59,7 +59,7 @@ without prior permission by the authors of Eressea.
 static int tolua_bufunit(lua_State * L) {
     char buf[8192];
     unit *self = (unit *)tolua_tousertype(L, 1, 0);
-    int mode = (int)tolua_tonumber(L, 2, see_unit);
+    int mode = (int)tolua_tonumber(L, 2, (int)seen_unit);
     if (!self)  return 0;
 
     bufunit(self->faction, self, 0, mode, buf, sizeof(buf));

src/bindings.c

@@ -974,7 +974,7 @@ static int tolua_report_unit(lua_State * L)
     char buffer[512];
     unit *u = (unit *)tolua_tousertype(L, 1, 0);
     faction *f = (faction *)tolua_tousertype(L, 2, 0);
-    bufunit(f, u, 0, see_unit, buffer, sizeof(buffer));
+    bufunit(f, u, 0, seen_unit, buffer, sizeof(buffer));
     tolua_pushstring(L, buffer);
     return 1;
 }

src/creport.c

@@ -734,7 +734,7 @@ static void cr_output_spells(stream *out, const unit * u, int maxlevel)
 * @param u unit to report
 */
 void cr_output_unit(stream *out, const region * r, const faction * f,
-    const unit * u, int mode)
+    const unit * u, seen_mode mode)
 {
     /* Race attributes are always plural and item attributes always
      * singular */

src/creport.h

@@ -24,7 +24,8 @@ extern "C" {
     void register_cr(void);
 
     int crwritemap(const char *filename);
-    void cr_output_unit(struct stream *out, const struct region * r, const struct faction * f, const struct unit * u, int mode);
+    void cr_output_unit(struct stream *out, const struct region * r,
+        const struct faction * f, const struct unit * u, seen_mode mode);
 
 #ifdef __cplusplus
 }

src/reports.test.c

@@ -194,7 +194,7 @@ static void test_cr_unit(CuTest *tc) {
     renumber_unit(u, 1234);
 
     mstream_init(&strm);
-    cr_output_unit(&strm, r, f, u, see_unit);
+    cr_output_unit(&strm, r, f, u, seen_unit);
     strm.api->rewind(strm.handle);
     CuAssertIntEquals(tc, 0, strm.api->readln(strm.handle, line, sizeof(line)));
     CuAssertStrEquals(tc, line, "EINHEIT 1234");

src/test_eressea.c

@@ -61,7 +61,6 @@ int RunAllTests(int argc, char *argv[])
     /* self-test */
     ADD_SUITE(tests);
     ADD_SUITE(callback);
-    ADD_SUITE(seen);
     ADD_SUITE(json);
     ADD_SUITE(jsonconf);
     ADD_SUITE(direction);

src/tests.c

@@ -179,7 +179,6 @@ static void test_reset(void) {
     free_shiptypes();
     free_races();
     free_spellbooks();
-    free_seen();
     free_prefixes();
     mt_clear();
     for (i = 0; i != MAXSKILLS; ++i) {