[dcl.fct] Clarify that type adjustment does not make zero-length arrays valid

Author: eisenwave

source/declarations.tex

@@ -3871,6 +3871,8 @@
 
 void h(int x(const int));       // \#3
 void h(int (*)(int)) {}         // defines \#3
+
+void j(int[0]);                 // error: \tcode{int[0]} is not a valid type
 \end{codeblock}
 \end{example}