Fix implicit int errors.
--- configure.orig	2025-03-12 00:24:41.000000000 -0500
+++ configure	2025-03-12 00:23:26.000000000 -0500
@@ -711,7 +711,7 @@
 cat > conftest.$ac_ext <<EOF
 #line 713 "configure"
 #include "confdefs.h"
-main(){return(0);}
+int main(void){return 0;}
 EOF
 if { (eval echo configure:717: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   ac_cv_prog_cc_works=yes
--- libhfs/configure.orig	2025-03-12 00:24:41.000000000 -0500
+++ libhfs/configure	2025-03-12 00:23:26.000000000 -0500
@@ -657,7 +657,7 @@
 cat > conftest.$ac_ext <<EOF
 #line 659 "configure"
 #include "confdefs.h"
-main(){return(0);}
+int main(void){return 0;}
 EOF
 if { (eval echo configure:663: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   ac_cv_prog_cc_works=yes
@@ -1280,7 +1280,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-main()
+int main(void)
 {
   char c0 = 0x40, c1 = 0x80, c2 = 0x81;
   exit(memcmp(&c0, &c2, 1) < 0 && memcmp(&c1, &c2, 1) < 0 ? 0 : 1);
--- librsrc/configure.orig	1998-11-02 17:34:06.000000000 -0600
+++ librsrc/configure	2025-03-12 00:24:23.000000000 -0500
@@ -657,7 +657,7 @@
 cat > conftest.$ac_ext <<EOF
 #line 659 "configure"
 #include "confdefs.h"
-main(){return(0);}
+int main(void){return 0;}
 EOF
 if { (eval echo configure:663: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   ac_cv_prog_cc_works=yes
