CheckBasicStyle: Check number of empty lines between functions (#4267)

Add check for number of empty lines between functions and fix the corresponding failures

src/BlockID.cpp

@@ -234,6 +234,7 @@ int BlockStringToType(const AString & a_BlockTypeString)
 
 
 
+
 bool StringToItem(const AString & a_ItemTypeString, cItem & a_Item)
 {
 	AString ItemName = TrimString(a_ItemTypeString);