invoke.texi: Document new implicit structure initialization warning.

        * invoke.texi: Document new implicit structure initialization
        warning.

From-SVN: r20810

gcc/ChangeLog

+Tue Jun 30 00:56:19 1998  Bruno Haible <haible@ilog.fr>
+
+	* invoke.texi: Document new implicit structure initialization
+	warning.
+
 Mon Jun 29 22:12:06 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* Merge from gcc2 June 9, 1998 snapshot.  See ChangeLog.13 for

gcc/invoke.texi

@@ -1534,6 +1534,16 @@ struct s @{ int f, g; @};
 struct t @{ struct s h; int i; @};
 struct t x = @{ 1, 2, 3 @};
 @end smallexample
+
+@item
+An aggregate has an initializer which does not initialize all members.
+For example, the following code would cause such a warning, because
+@code{x.h} would be implicitly initialized to zero:
+
+@smallexample
+struct s @{ int f, g, h; @};
+struct s x = @{ 3, 4 @};
+@end smallexample
 @end itemize
 
 @item -Wtraditional