games/lincity: Fix build on gcc5

GCC5 doesn't like it when static variables are used inside inline
functions.

games/lincity/files/patch-mouse.c

@@ -0,0 +1,29 @@
+--- mouse.c.orig	2004-07-03 08:03:17 UTC
++++ mouse.c
+@@ -1057,7 +1057,7 @@ choose_residence (void)
+    and set to 1 if the existing transport if the more expensive sort
+    (e.g. GROUP_RAIL when overwriting GROUP_ROAD).
+ */
+-inline int
++int
+ mt_erase(int x, int y)
+ {
+     if (x < 0 || y < 0 || x >= WORLD_SIDE_LEN || y >= WORLD_SIDE_LEN)
+@@ -1094,7 +1094,7 @@ mt_erase(int x, int y)
+     return 0;
+ }
+ 
+-inline int
++int
+ mt_temp(int x, int y)
+ {
+     if (x < 0 || y < 0 || x >= WORLD_SIDE_LEN || y >= WORLD_SIDE_LEN)
+@@ -1128,7 +1128,7 @@ mt_temp(int x, int y)
+     return 0;
+ }
+ 
+-inline int
++int
+ mt_perm(int x, int y)
+ {
+     /* By now, it has already been mt_erase()'d */