Fixed some errors found by the static analyzer

lib/map.c

@@ -53,6 +53,9 @@ static bool lMapSetSimple(lMap *map, lVal key, lVal val){
 	const u32 size = map->size;
 	const u32 mask = size-1;
 	u32 off = lHashVal(key) & mask;
+	if(unlikely(map->entries == NULL)){
+		return false;
+	}
 	for(u32 i=0; i < size; i++){
 		if(map->entries[off].key.type == ltNil){
 			map->entries[off].key = key;
@@ -104,11 +107,13 @@ static void lMapResize(lMap *map, u32 size){
 	const u32 oldSize = map->size;
 	map->entries = calloc(size, sizeof(lMapEntry));
 	map->size = size;
-	for(uint i=0; i < oldSize; i++){
-		if(oldEntries[i].key.type == ltNil){ continue;}
-		lMapSetSimple(map, oldEntries[i].key, oldEntries[i].val);
+	if(oldEntries != NULL){
+		for(uint i=0; i < oldSize; i++){
+			if(oldEntries[i].key.type == ltNil){ continue;}
+			lMapSetSimple(map, oldEntries[i].key, oldEntries[i].val);
+		}
+		free((void *)oldEntries);
 	}
-	free((void *)oldEntries);
 }
 
 lVal lnfMapNew(lVal v) {