diff --git a/src/common/kernel/faction.c b/src/common/kernel/faction.c
index b99eb60cc..d25d6b606 100644
--- a/src/common/kernel/faction.c
+++ b/src/common/kernel/faction.c
@@ -141,4 +141,4 @@ checkpasswd(faction * f, const char * passwd)
 		return true;
 	}
 	return false;
-}
\ No newline at end of file
+}
diff --git a/src/common/kernel/save.c b/src/common/kernel/save.c
index bbd53c023..d37c7c6ca 100644
--- a/src/common/kernel/save.c
+++ b/src/common/kernel/save.c
@@ -1835,7 +1835,7 @@ writeunit(FILE * F, const unit * u)
 
 	for (i=0;i!=u->skill_size;++i) {
 		skill * sv = u->skills+i;
-		assert(sv->level>=0 && sv->weeks>=0 && sv->weeks<=sv->level*2+1);
+		assert(sv->weeks<=sv->level*2+1);
 		if (sv->level>0) {
 			wi(F, sv->id);
 			wi(F, sv->level);
@@ -1890,7 +1890,7 @@ readregion(FILE * F, int x, int y)
 		while (r->attribs) a_remove(&r->attribs, r->attribs);
 		if (r->land) {
 			free(r->land); /* mem leak */
-			r->land->demands;
+			r->land->demands = 0; /* mem leak */
 		}
 		while (r->resources) {
 			rawmaterial * rm = r->resources;
@@ -2341,4 +2341,4 @@ writefaction(FILE * F, const faction * f)
 #if RELEASE_VERSION>=GROUPS_VERSION
 	write_groups(F, f->groups);
 #endif
-}
\ No newline at end of file
+}
diff --git a/src/common/kernel/unit.c b/src/common/kernel/unit.c
index 3263419fc..9b3ea6d30 100644
--- a/src/common/kernel/unit.c
+++ b/src/common/kernel/unit.c
@@ -696,7 +696,7 @@ transfermen(unit * u, unit * u2, int n)
 				if (sn==NULL) sn = add_skill(u2, sk);
 				sn->level = (unsigned char)level;
 				sn->weeks = (unsigned char)weeks;
-				assert(sn->level>=0 && sn->weeks>0 && sn->weeks<=sn->level*2+1);
+				assert(sn->weeks>0 && sn->weeks<=sn->level*2+1);
 			} else if (sn) {
 				sk_set(sn, 0);
 			}
@@ -863,7 +863,6 @@ get_skill(const unit * u, skill_t sk)
 {
 	skill * sv = u->skills;
 	while (sv!=u->skills+u->skill_size) {
-		assert(sv->level>=0 && sv->weeks>=0);
 		if (sv->id==sk) return sv;
 		++sv;
 	}
@@ -875,7 +874,6 @@ has_skill(const unit * u, skill_t sk)
 {
 	skill * sv = u->skills;
 	while (sv!=u->skills+u->skill_size) {
-		assert(sv->level>=0 && sv->weeks>=0);
 		if (sv->id==sk) {
 			return (sv->level>0);
 		}