Fixed 1.7 arm swing animation

src/ClientHandle.cpp

@@ -1066,6 +1066,28 @@ void cClientHandle::HandleAnimation(char a_Animation)
 		return;
 	}
 
+	// Because the animation ID sent to servers by clients are different to those sent back, we need this
+	switch (a_Animation)
+	{
+		case 0: // No animation - wiki.vg doesn't say that client has something specific for it, so I suppose it will just become -1
+		case 1:
+		case 2:
+		case 3:
+		{
+			a_Animation--; // Offset by -1
+			break;
+		}
+		case 5: 
+		case 6:
+		case 7:
+		{
+			a_Animation -= 2; // Offset by -2
+			break;
+		}
+		default: // Anything else is the same
+			break;
+	}
+
 	m_Player->GetWorld()->BroadcastEntityAnimation(*m_Player, a_Animation, this);
 }