use locale-indep. c_is* functions for parsing, not isspace, isprint etc

* src/parse-gram.y: Include "c-ctype.h".
(add_param): Parse with c_isspace, not isspace.
* src/parse-gram.c: Likewise.
* src/scan-gram.l: Include c-ctype.h, not ctype.h.
(SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER): Use c_isspace and c_isprint,
not ctype.h's locale-dependent functions.

src/parse-gram.c

@@ -94,6 +94,7 @@
 #include <config.h>
 #include "system.h"
 
+#include "c-ctype.h"
 #include "complain.h"
 #include "conflicts.h"
 #include "files.h"
@@ -3170,11 +3171,11 @@ add_param (char const *type, char *decl, location loc)
   /* Strip the surrounding '{' and '}', and any blanks just inside
      the braces.  */
   --p;
-  while (isspace ((unsigned char) *p))
+  while (c_isspace ((unsigned char) *p))
     --p;
   p[1] = '\0';
   ++decl;
-  while (isspace ((unsigned char) *decl))
+  while (c_isspace ((unsigned char) *decl))
     ++decl;
 
   if (! name_start)

src/parse-gram.y

@@ -20,6 +20,7 @@
 #include <config.h>
 #include "system.h"
 
+#include "c-ctype.h"
 #include "complain.h"
 #include "conflicts.h"
 #include "files.h"
@@ -735,11 +736,11 @@ add_param (char const *type, char *decl, location loc)
   /* Strip the surrounding '{' and '}', and any blanks just inside
      the braces.  */
   --p;
-  while (isspace ((unsigned char) *p))
+  while (c_isspace ((unsigned char) *p))
     --p;
   p[1] = '\0';
   ++decl;
-  while (isspace ((unsigned char) *decl))
+  while (c_isspace ((unsigned char) *decl))
     ++decl;
 
   if (! name_start)

src/scan-gram.l

@@ -36,7 +36,7 @@
 #include "reader.h"
 #include "uniqstr.h"
 
-#include <ctype.h>
+#include <c-ctype.h>
 #include <mbswidth.h>
 #include <quote.h>
 
@@ -560,7 +560,7 @@ splice	 (\\[ \f\t\v]*\n)*
   \\(.|\n)	{
     char const *p = yytext + 1;
     /* Quote only if escaping won't make the character visible.  */
-    if (isspace ((unsigned char) *p) && isprint ((unsigned char) *p))
+    if (c_isspace ((unsigned char) *p) && c_isprint ((unsigned char) *p))
       p = quote (p);
     else
       p = quotearg_style_mem (escape_quoting_style, p, 1);