portability: multiple typedefs

commit 0a5bfb4fda7654bfda701f825c796e54150545a1
Author: Akim Demaille <[email protected]>
Date:   Mon Aug 3 06:26:34 2020 +0200

    portability: multiple typedefs
    
    Older versions of GCC (4.1.2 here) don't like repeated typedefs.
    
          CC       src/bison-parse-simulation.o
        src/parse-simulation.c:61: error: redefinition of typedef 'parse_state'
        src/parse-simulation.h:74: error: previous declaration of 'parse_state' was here
        make: *** [Makefile:7876: src/bison-parse-simulation.o] Error 1
    
    Reported by Nelson H. F. Beebe.
    
    * src/parse-simulation.c (parse_state): Don't typedef,
    parse-simulation.h did it already.

diff --git a/src/parse-simulation.c b/src/parse-simulation.c
index ba09c44c..70bfb177 100644
--- a/src/parse-simulation.c
+++ b/src/parse-simulation.c
@@ -28,7 +28,7 @@
 #include "lssi.h"
 #include "nullable.h"
 
-typedef struct parse_state
+struct parse_state
 {
   // Path of state-items the parser has traversed.
   struct si_chunk
@@ -58,7 +58,7 @@ typedef struct parse_state
   // Causes chunk contents to be freed when the reference count is
   // one. Used when only the chunk metadata will be needed.
   bool free_contents_early;
-} parse_state;
+};
 
 
 static void