EMPTYINIT

Message        An initializer list without an expression is not
               valid.  The compiler will replace the empty
               expression with the constant 0.

Description    The C standard requires that an initializer list
               contain an expression.  The compiler has encountered
               one without an expression.  The compiler will treat
               the empty list ({}) as if it contained a single zero
               ({0}).  This is for compatibility with some other C
               compilers.  Be aware that this syntax may not be
               accepted by other C compilers.

User Action    Supply an expression to the initializer.