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Make line directive more portable.

--- a/amalg.sh

+++ b/amalg.sh

@@ -21,6 +21,6 @@

 for f in "$@"

 do

-  echo "#line 0 \"$f\""

+  echo "#line 1 \"$f\""

   grep -v '^#include' "$f"

 done

--- a/minipeg.c

+++ b/minipeg.c

@@ -26,9 +26,9 @@

 #include <stdlib.h>

 #include <string.h>

 #include <unistd.h>

-#line 0 "version.h"

+#line 1 "version.h"

 #define MINIPEG_VERSION "4e9111b"

-#line 0 "tree.h"

+#line 1 "tree.h"

 enum { Unknown= 0, Rule, Variable, Name, Dot, Character, String, Class, Action, Inline, Predicate, Error, Alternate, Sequence, PeekFor, PeekNot, Query, Star, Plus };

@@ -124,7 +124,7 @@

 extern void  Node_print(Node *node);

 extern void  Rule_print(Node *node);

-#line 0 "compile.c"

+#line 1 "compile.c"

 #ifdef WIN32

 # undef inline

@@ -931,7 +931,7 @@

   Rule_compile_c2(node);

   fprintf(output, footer, start->rule.name);

 }

-#line 0 "tree.c"

+#line 1 "tree.c"

 #ifdef WIN32

 # undef inline

@@ -1272,7 +1272,7 @@

 }

 void Rule_print(Node *node)	{ Rule_fprint(stderr, node); }

-#line 0 "peg.c"

+#line 1 "peg.c"

 /* Parser generated by minipeg 4e9111b */

 #define YYRULECOUNT 38