Fixes Undefined Behavior in LaneTupel (Strict Aliasing), resolves 2665

It's complicated :sigh: read this please:
http://dbp-consulting.com/tutorials/StrictAliasing.html

tl;dr: has to go through a memcpy (in C++) as in:
https://github.com/WebAssembly/binaryen/blob/184cc11cee2a65d30c7696eb3284e132099e4acb/src/support/utilities.h#L29-L40

src/util/guidance/turn_lanes.cpp

@@ -2,6 +2,7 @@
 
 #include <algorithm>
 #include <iostream>
+#include <tuple>
 
 #include <boost/assert.hpp>
 
@@ -24,10 +25,8 @@ LaneTupel::LaneTupel(const LaneID lanes_in_turn, const LaneID first_lane_from_th
 // comparation based on interpretation as unsigned 32bit integer
 bool LaneTupel::operator==(const LaneTupel other) const
 {
-    static_assert(sizeof(LaneTupel) == sizeof(std::uint16_t),
-                  "Comparation requires LaneTupel to be the of size 16Bit");
-    return *reinterpret_cast<const std::uint16_t *>(this) ==
-           *reinterpret_cast<const std::uint16_t *>(&other);
+    return std::tie(lanes_in_turn, first_lane_from_the_right) ==
+           std::tie(other.lanes_in_turn, other.first_lane_from_the_right);
 }
 
 bool LaneTupel::operator!=(const LaneTupel other) const { return !(*this == other); }
@@ -35,10 +34,8 @@ bool LaneTupel::operator!=(const LaneTupel other) const { return !(*this == othe
 // comparation based on interpretation as unsigned 32bit integer
 bool LaneTupel::operator<(const LaneTupel other) const
 {
-    static_assert(sizeof(LaneTupel) == sizeof(std::uint16_t),
-                  "Comparation requires LaneTupel to be the of size 16Bit");
-    return *reinterpret_cast<const std::uint16_t *>(this) <
-           *reinterpret_cast<const std::uint16_t *>(&other);
+    return std::tie(lanes_in_turn, first_lane_from_the_right) <
+           std::tie(other.lanes_in_turn, other.first_lane_from_the_right);
 }
 
 } // namespace guidance