Fix:

error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]

https://sourceforge.net/p/xgalaga/bugs/5/
--- linux-joystick.c.orig	2008-03-05 15:58:16.000000000 -0600
+++ linux-joystick.c	2024-10-11 11:46:36.000000000 -0500
@@ -81,5 +81,6 @@
   }
 }
 #else
+int
 js_device=0;
 #endif /* __linux__ */
--- title.c.orig	2008-03-05 15:58:16.000000000 -0600
+++ title.c	2024-10-11 11:43:07.000000000 -0500
@@ -17,9 +17,9 @@
 #include "proto.h"
 
 /* for scrolling credits */
-const LINESIZE= 70;
-const VISIBLELINES=7;
-const SPEEDFACTOR=5;
+const int LINESIZE= 70;
+const int VISIBLELINES=7;
+const int SPEEDFACTOR=5;
 char *gchLBuf;
 int giCreditLines=0, giActCreditLine=0;