Resolve -Wstrict-prototypes warnings with clang-15

warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]

Source/CParse/cparse.h

@@ -43,7 +43,7 @@ extern "C" {
   extern void scanner_clear_rename(void);
   extern void scanner_set_location(String *file, int line);
   extern void scanner_set_main_input_file(String *file);
-  extern String *scanner_get_main_input_file();
+  extern String *scanner_get_main_input_file(void);
   extern void Swig_cparse_follow_locators(int);
   extern void start_inline(char *, int);
   extern String *scanner_ccode;

Source/CParse/cscanner.c

@@ -123,7 +123,7 @@ void Swig_cparse_cplusplusout(int v) {
  * Initialize buffers
  * ------------------------------------------------------------------------- */
 
-void scanner_init() {
+void scanner_init(void) {
   scan = NewScanner();
   Scanner_idstart(scan,"%");
   scan_init = 1;
@@ -528,11 +528,11 @@ void scanner_set_location(String *file, int line) {
   Scanner_set_location(scan,file,line-1);
 }
 
-void scanner_check_typedef() {
+void scanner_check_typedef(void) {
   check_typedef = 1;
 }
 
-void scanner_ignore_typedef() {
+void scanner_ignore_typedef(void) {
   check_typedef = 0;
 }
 
@@ -540,7 +540,7 @@ void scanner_last_id(int x) {
   last_id = x;
 }
 
-void scanner_clear_rename() {
+void scanner_clear_rename(void) {
   rename_active = 0;
 }
 
@@ -554,7 +554,7 @@ void scanner_set_main_input_file(String *file) {
   main_input_file = file;
 }
 
-String *scanner_get_main_input_file() {
+String *scanner_get_main_input_file(void) {
   return main_input_file;
 }
 

Source/CParse/parser.y

@@ -50,7 +50,7 @@
  *                               Externals
  * ----------------------------------------------------------------------------- */
 
-int  yyparse();
+int  yyparse(void);
 
 /* NEW Variables */
 
@@ -349,7 +349,7 @@ static String *make_name(Node *n, String *name,SwigType *decl) {
 }
 
 /* Generate an unnamed identifier */
-static String *make_unnamed() {
+static String *make_unnamed(void) {
   unnamed++;
   return NewStringf("$unnamed%d$",unnamed);
 }
@@ -874,7 +874,7 @@ static void add_typedef_name(Node *n, Node *declnode, String *oldName, Symtab *c
 
 /* If the class name is qualified.  We need to create or lookup namespace entries */
 
-static Symtab *set_scope_to_global() {
+static Symtab *set_scope_to_global(void) {
   Symtab *symtab = Swig_symbol_global_scope();
   Swig_symbol_setscope(symtab);
   return symtab;

Source/CParse/templ.c

@@ -19,7 +19,7 @@ static int template_debug = 0;
 
 const char *baselists[3];
 
-void SwigType_template_init() {
+void SwigType_template_init(void) {
   baselists[0] = "baselist";
   baselists[1] = "protectedbaselist";
   baselists[2] = "privatebaselist";