Core/DataStores: Implemented a generic way of sending db2 hotfixes

src/server/shared/DataStores/DB2FileLoader.cpp

@@ -30,17 +30,17 @@ DB2FileLoader::DB2FileLoader()
 
 bool DB2FileLoader::Load(const char *filename, const char *fmt)
 {
-    uint32 header = 48;
     if (data)
     {
         delete [] data;
-        data=NULL;
+        data = NULL;
     }
 
     FILE* f = fopen(filename, "rb");
     if (!f)
         return false;
 
+    uint32 header;
     if (fread(&header, 4, 1, f) != 1)                        // Signature
     {
         fclose(f);
@@ -114,12 +114,12 @@ bool DB2FileLoader::Load(const char *filename, const char *fmt)
 
     if (build > 12880)
     {
-        if (fread(&unk2, 4, 1, f) != 1)                // Unknown WDB2
+        if (fread(&minIndex, 4, 1, f) != 1)                           // MinIndex WDB2
         {
             fclose(f);
             return false;
         }
-        EndianConvert(unk2);
+        EndianConvert(minIndex);
 
         if (fread(&maxIndex, 4, 1, f) != 1)                           // MaxIndex WDB2
         {
@@ -145,7 +145,7 @@ bool DB2FileLoader::Load(const char *filename, const char *fmt)
 
     if (maxIndex != 0)
     {
-        int32 diff = maxIndex - unk2 + 1;
+        int32 diff = maxIndex - minIndex + 1;
         fseek(f, diff * 4 + diff * 2, SEEK_CUR);    // diff * 4: an index for rows, diff * 2: a memory allocation bank
     }