BASE: Fix some leaks found by valgrind.

It seems that there are some leaks in libass, can't fix those...

src/base/stack.c

@@ -51,11 +51,12 @@ stack_push(struct stack *lst, void *item)
         return 1;
 
     if (lst->size == lst->len) {
-        volatile void **new = realloc(lst->contents,
-                                      lst->size * 2 * sizeof(void *));
+        volatile void **new = realloc(lst->contents, lst->size * 2 * sizeof(void *));
 
-        if (NULL == new)
-            return 1;
+        if (NULL == new) {
+            LOG_ERROR("GENERAL", "Out of memory");
+            abort();
+        }
 
         lst->contents = new;
         lst->size *= 2;

src/database/open.c

@@ -74,12 +74,10 @@ __inc(volatile sqlite3 *db, const char *name, bool check)
             exit(EXIT_FAILURE);
     }
 
-    struct named_db *item = malloc(sizeof(struct named_db));
-    if (!item)
-        exit(EXIT_FAILURE);
-    item->name = strdup(name);
-    item->db   = db;
-    if (stack_push(&db_stack, item))
+    struct named_db item;
+    item.name = strdup(name);
+    item.db   = db;
+    if (stack_push(&db_stack, &item))
         exit(EXIT_FAILURE);
     return;
 error:
@@ -161,10 +159,14 @@ __check_schema(volatile sqlite3 *db)
     sqlite3_stmt *stmt = NULL;
     SQLITE_PREPARE(db, stmt, SQL, error);
     SQLITE_STEP_ROW(db, stmt, error);
-    if (9 != sqlite3_column_int(stmt, 0))
+    if (9 != sqlite3_column_int(stmt, 0)) {
+        sqlite3_finalize(stmt);
         return true;
+    }
 error:
     LOG_ERROR("DB", "Schema is invalid: missing tables");
+    if (stmt)
+        sqlite3_finalize(stmt);
     return false;
 }
 
@@ -173,7 +175,7 @@ __is_attached(volatile sqlite3 *db, const char *name)
 {
     static const char *SQL_STMT =
         "SELECT name FROM pragma_database_list WHERE name = ?;\n";
-    sqlite3_stmt *stmt = 0;
+    sqlite3_stmt *stmt = NULL;
     bool ret = false;
 
     SQLITE_PREPARE(db, stmt, SQL_STMT, error);

src/main/server.c

@@ -143,6 +143,9 @@ launch_klkt(va_list UNUSED *___args)
     static const char *basename_appimage_arch    = "klkt.AppImage";
     static const char *basename_appimage_no_arch = "klkt-" LKT_ARCH ".AppImage";
 
+    memset(exe_path, 0, sizeof(exe_path));
+    memset(try_name, 0, sizeof(try_name));
+
     posix_spawn_file_actions_t action;
     posix_spawn_file_actions_init(&action);
     posix_spawn_file_actions_addopen(&action, STDOUT_FILENO, "/dev/null", O_RDONLY, 0);