[intro.object] Use bullets to help clarify wording added in CWG2753.

Author: burblebee

source/basic.tex

@@ -3314,13 +3314,13 @@
 Two objects
 with overlapping lifetimes
 that are not bit-fields
-may have the same address
-if one is nested within the other,
-or
-if at least one is a subobject of zero size
-and they are of different types,
+may have the same address if
+\begin{itemize}
+\item one is nested within the other,
+\item at least one is a subobject of zero size and they are of different types,
 or
-if they are both potentially non-unique objects;
+\item they are both potentially non-unique objects;
+\end{itemize}
 otherwise, they have distinct addresses
 and occupy disjoint bytes of storage.
 \begin{footnote}