Core/Misc: Fixed warnings found by GCC 6

(cherry picked from commit 67fd3ee726cbd509e6a15f81f4780e757a78a8b5)

# Conflicts:
#	src/server/game/Spells/Auras/SpellAuras.cpp

1 files changed, 2 insertions, 2 deletions

diff --git a/src/server/database/Database/DatabaseWorkerPool.h b/src/server/database/Database/DatabaseWorkerPool.h
index d883366237f..59a42096c8e 100644
--- a/src/server/database/Database/DatabaseWorkerPool.h
+++ b/src/server/database/Database/DatabaseWorkerPool.h
@@ -120,7 +120,7 @@ class DatabaseWorkerPool
         //! This method should only be used for queries that are only executed once, e.g during startup.
         void DirectExecute(const char* sql)
         {
-            if (!sql)
+            if (Trinity::IsFormatEmptyOrNull(sql))
                 return;
 
             T* connection = GetFreeConnection();
@@ -175,7 +175,7 @@ class DatabaseWorkerPool
         template<typename Format, typename... Args>
         QueryResult PQuery(Format&& sql, Args&&... args)
         {
-            if (!sql)
+            if (Trinity::IsFormatEmptyOrNull(sql))
                 return QueryResult(nullptr);
 
             return Query(Trinity::StringFormat(std::forward<Format>(sql), std::forward<Args>(args)...).c_str());