+2019-03-24 Tom Tromey <tom@tromey.com>
+
+ * ada-lang.c (standard_lookup): Simplify initialization.
+ (ada_lookup_symbol_nonlocal): Simplify return.
+ * solib-spu.c (spu_lookup_lib_symbol): Simplify return.
+ * solib-darwin.c (darwin_lookup_lib_symbol): Simplify return.
+ * solib-svr4.c (elf_lookup_lib_symbol): Simplify return.
+ * rust-lang.c (rust_lookup_symbol_nonlocal): Simplify
+ initialization.
+ * solib.c (solib_global_lookup): Simplify.
+ * symtab.c (null_block_symbol): Remove.
+ (symbol_cache_lookup): Simplify returns.
+ (lookup_language_this): Simplify returns.
+ (lookup_symbol_aux): Simplify return.
+ (lookup_local_symbol): Simplify returns.
+ (lookup_global_symbol_from_objfile): Simplify return.
+ (lookup_symbol_in_objfile_symtabs)
+ (lookup_symbol_in_objfile_from_linkage_name): Simplify return.
+ (lookup_symbol_via_quick_fns, lookup_symbol_in_static_block)
+ (lookup_static_symbol, lookup_global_symbol): Simplify return.
+ * cp-namespace.c (cp_lookup_bare_symbol)
+ (cp_search_static_and_baseclasses, cp_lookup_symbol_via_imports)
+ (cp_lookup_symbol_via_all_imports, cp_lookup_nested_symbol_1)
+ (cp_lookup_nested_symbol): Don't use null_block_symbol.
+ (cp_lookup_symbol_via_imports): Simplify initialization.
+ (find_symbol_in_baseclass): Likewise.
+ * symtab.h (null_block_symbol): Remove.
+ * d-namespace.c (d_lookup_symbol): Don't use null_block_symbol.
+ (d_lookup_nested_symbol, d_lookup_symbol_imports)
+ (d_lookup_symbol_module): Likewise.
+ (find_symbol_in_baseclass): Simplify initialization.
+
2019-03-24 Tom Tromey <tom@tromey.com>
* expression.h: Don't include symtab.h.