Fix compilation error

Author: ali-ince

seabolt-test/src/mocks.cpp

@@ -37,6 +37,16 @@ int64_t BoltUtil_get_time_ms()
     return 0;
 }
 
+int64_t BoltUtil_get_time_ms_from(struct timespec* tp)
+{
+    return 0;
+}
+
+void BoltUtil_sleep(int milliseconds)
+{
+
+}
+
 int64_t BoltUtil_increment(volatile int64_t* ref)
 {
     return (*ref += 1);

seabolt/src/bolt/pool/direct-pool.c

@@ -204,7 +204,8 @@ void BoltDirectPool_destroy(struct BoltDirectPool* pool)
 struct BoltConnectionResult BoltDirectPool_acquire(struct BoltDirectPool* pool)
 {
     struct BoltConnectionResult handle;
-    int index = 0, pool_error = 0;
+    int index = 0;
+    enum BoltConnectionError pool_error = BOLT_SUCCESS;
 
     int64_t started_at = BoltUtil_get_time_ms();
     BoltLog_info(pool->config->log, "acquiring connection from the pool");