Add Asan profile, fix multiple bugs.

Added Asan profile to help catch and fix various bugs (and indeed, there
were few of them).

Additionally, fixed bhunit macro to process arguments only once.

unit/CMakeLists.txt

@@ -25,5 +25,5 @@ target_include_directories(bhunit PUBLIC include)
 if(MSVC)
   target_compile_options(bhunit PRIVATE /W4 /WX)
 else()
-  target_compile_options(bhunit PRIVATE -Wall -Wextra -Wpedantic -Werror)
+  target_compile_options(bhunit PRIVATE -Wall -Wextra -Wpedantic -Werror -fstrict-aliasing)
 endif()