patch 8.2.4043: using int for second argument of ga_init2()

Problem:    Using int for second argument of ga_init2().
Solution:   Remove unnessary type cast (int) when using sizeof().
diff --git a/src/hardcopy.c b/src/hardcopy.c
index 33c72b7..c99dc5f 100644
--- a/src/hardcopy.c
+++ b/src/hardcopy.c
@@ -1650,7 +1650,7 @@
 	    prt_write_string("s\n");
 
 	ga_clear(&prt_ps_buffer);
-	ga_init2(&prt_ps_buffer, (int)sizeof(char), prt_bufsiz);
+	ga_init2(&prt_ps_buffer, sizeof(char), prt_bufsiz);
     }
 }
 
@@ -2649,7 +2649,7 @@
     prt_bufsiz = psettings->chars_per_line;
     if (prt_out_mbyte)
 	prt_bufsiz *= 2;
-    ga_init2(&prt_ps_buffer, (int)sizeof(char), prt_bufsiz);
+    ga_init2(&prt_ps_buffer, sizeof(char), prt_bufsiz);
 
     prt_page_num = 0;