Fix compilation warnings in Move.cpp
These where the compilation warnings
/home/joshua/development/ksokoban/Move.cpp: In member function ‘const char* Move::load(const char*)’:
/home/joshua/development/ksokoban/Move.cpp:134:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
134 | last = true;
| ~~~~~^~~~~~
/home/joshua/development/ksokoban/Move.cpp:135:5: note: here
135 | case 'l':
| ^~~~
/home/joshua/development/ksokoban/Move.cpp:139:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
139 | last = true;
| ~~~~~^~~~~~
/home/joshua/development/ksokoban/Move.cpp:140:5: note: here
140 | case 'r':
| ^~~~
/home/joshua/development/ksokoban/Move.cpp:144:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
144 | last = true;
| ~~~~~^~~~~~
/home/joshua/development/ksokoban/Move.cpp:145:5: note: here
145 | case 'u':
| ^~~~
/home/joshua/development/ksokoban/Move.cpp:149:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
149 | last = true;
| ~~~~~^~~~~~
/home/joshua/development/ksokoban/Move.cpp:150:5: note: here
150 | case 'd':
| ^~~~
Edited by Joshua Houghton