Makefile fix for address-sanitizer

Add -fsanitize=address also to the linker options, when using the Makefile based build process.

After activating the address-sanitizer gcc 7.2.1 was complaining about possible uninitialized use of double dDeltaMv, which I think is an effect of the source file getting to long and the compiler not being able to track back the exact usage conditions. Adding an zero-initialization here.