debug build: build without -fsanitize=address

Sorry :-)
Seems then we can't use valgrind since that does its own ASAN things.

So maybe developers needs to set some flags by themselves to find these
memory issues.

https://fuzzing-project.org/tutorial-cflags.html might be of help.

Regards: https://github.com/profanity-im/profanity/issues/1512

configure-debug

@@ -1,4 +1,4 @@
 #!/bin/sh
 
 #./configure PYTHON_VERSION=3 CFLAGS='-g3 -O0' CXXFLAGS='-g3 -O0' $@
-./configure CFLAGS='-g3 -O0 -fsanitize=address' CXXFLAGS='-g3 -O0' $@
+./configure CFLAGS='-g3 -O0' CXXFLAGS='-g3 -O0' $@