Build Source and SourceX with UBSAN by default

.editorconfig

@@ -23,3 +23,7 @@ end_of_line = lf
 [CMakeLists.txt]
 indent_style = space
 indent_size = 2
+
+[*.cmake]
+indent_style = space
+indent_size = 2

CMakeLists.txt

@@ -7,6 +7,7 @@ if(NOT CMAKE_BUILD_TYPE)
 endif()
 
 option(ASAN "Enable address sanitizer" ON)
+option(UBSAN "Enable undefined behaviour sanitizer" ON)
 option(DEBUG "Enable debug mode in engine" ON)
 option(SPAWN "Build the shareware version" OFF)
 option(DIST "Dynamically link only glibc and SDL2" OFF)
@@ -19,6 +20,7 @@ option(NONET "Disable network" OFF)
 if(BINARY_RELEASE)
   set(CMAKE_BUILD_TYPE "Release")
   set(ASAN OFF)
+  set(UBSAN OFF)
   set(DEBUG OFF)
   set(DIST ON)
   set(FASTER OFF)
@@ -37,6 +39,7 @@ endif()
 if(NIGHTLY_BUILD)
   set(CMAKE_BUILD_TYPE "RelWithDebInfo")
   set(ASAN OFF)
+  set(UBSAN OFF)
   set(DEBUG ON)
   set(DIST ON)
   set(FASTER OFF)
@@ -305,6 +308,10 @@ foreach(target devilution devilutionx)
     target_compile_options(${target} PUBLIC -fsanitize=address -fsanitize-recover=address)
     target_link_libraries(${target} PUBLIC -fsanitize=address -fsanitize-recover=address)
   endif()
+  if(UBSAN)
+    target_compile_options(${target} PUBLIC -fsanitize=undefined)
+    target_link_libraries(${target} PUBLIC -fsanitize=undefined)
+  endif()
 endforeach(target devilution devilutionx)
 
 if(DIST AND CMAKE_CXX_COMPILER_ID MATCHES "GCC")