setupapi: Declare a function static

[Andrew Talbot]

Changelog:
    setupapi: Declare a function static.

diff --git a/dlls/setupapi/parser.c b/dlls/setupapi/parser.c
index c94e513..85d87bb 100644
--- a/dlls/setupapi/parser.c
+++ b/dlls/setupapi/parser.c
@@ -365,8 +365,8 @@ static const WCHAR *get_string_subst( const struct inf_file *file, const WCHAR *
 /* do string substitutions on the specified text */
 /* the buffer is assumed to be large enough */
 /* returns necessary length not including terminating null */
-unsigned int PARSER_string_substW( const struct inf_file *file, const WCHAR *text, WCHAR *buffer,
-                                   unsigned int size )
+static unsigned int PARSER_string_substW( const struct inf_file *file, const WCHAR *text,
+                                          WCHAR *buffer, unsigned int size )
 {
     const WCHAR *start, *subst, *p;
     unsigned int len, total = 0;
diff --git a/dlls/setupapi/setupapi_private.h b/dlls/setupapi/setupapi_private.h
index caf1d3b..d01edba 100644
--- a/dlls/setupapi/setupapi_private.h
+++ b/dlls/setupapi/setupapi_private.h
@@ -70,8 +70,6 @@ struct inf_file;
 extern const WCHAR *DIRID_get_string( int dirid );
 extern unsigned int PARSER_string_substA( const struct inf_file *file, const WCHAR *text,
                                           char *buffer, unsigned int size );
-extern unsigned int PARSER_string_substW( const struct inf_file *file, const WCHAR *text,
-                                          WCHAR *buffer, unsigned int size );
 extern const WCHAR *PARSER_get_inf_filename( HINF hinf );
 extern WCHAR *PARSER_get_src_root( HINF hinf );
 extern WCHAR *PARSER_get_dest_dir( INFCONTEXT *context );