print/bibview: add missing casts to fix build with llvm22

The implicit casts are already protected by class checks.

print/bibview/patches/patch-ComboBo_c

@@ -0,0 +1,10 @@
+Index: ComboBo.c
+--- ComboBo.c.orig
++++ ComboBo.c
+@@ -768,5 +768,5 @@ ComboBoxSetString(fnw, dir)
+     }
+ 
+     strcpy(CurrentDir(fnw), dir);
+-    ChangeDirectory(fnw, 0);
++    ChangeDirectory((ComboBoxWidget) fnw, 0);
+ }

print/bibview/patches/patch-FileNom_c

@@ -36,3 +36,10 @@ Index: FileNom.c
      
      if (num <= 0)
      {
+@@ -1145,5 +1145,5 @@ FileNominatorSetDirectory(fnw, dir)
+ 	strcat(CurrentDir(fnw), "/");
+     }
+ 
+-    ChangeDirectory(fnw, 0);
++    ChangeDirectory((FileNominatorWidget) fnw, 0);
+ }