Core/DB2: Wrap DB2 structures in #pragma pack(1) to prevent byte padding and allow correct reading on all platforms

src/server/game/DataStores/DB2Structure.h

@@ -30,6 +30,13 @@
 #include <set>
 #include <vector>
 
+// GCC has alternative #pragma pack(N) syntax and old gcc version does not support pack(push, N), also any gcc version does not support it at some platform
+#if defined(__GNUC__)
+#pragma pack(1)
+#else
+#pragma pack(push, 1)
+#endif
+
 // Structures used to access raw DB2 data and required packing to portability
 struct ItemEntry
 {
@@ -138,4 +145,11 @@ struct ItemExtendedCostEntry
     //uint32    Unknown[5];                               // 26-30
 };
 
+// GCC has alternative #pragma pack(N) syntax and old gcc version does not support pack(push, N), also any gcc version does not support it at some platform
+#if defined(__GNUC__)
+#pragma pack()
+#else
+#pragma pack(pop)
+#endif
+
 #endif