Convert $header_cache_pagesize to type DT_LNUM.

Prior to commit 4bc76c2f there was no LNUM type, and so the workaround
was to store it as a string, converting in the hcache_open_gdbm()
call.

This will not affect the user interface or config file, because DT_NUM
and DT_LNUM read in a string from the config file and convert to a
number.  Quotes are used for escaping style, not passed through to the
variable setter.

So essentially this simply moves the conversion to parse_set(), and
provides feedback for a non-numeric type immediately.

3 files changed, 4 insertions, 3 deletions

diff --git a/globals.h b/globals.h
index f5c08a5c..4d508221 100644
--- a/globals.h
+++ b/globals.h
@@ -79,7 +79,7 @@ WHERE char *MessageCachedir;
 #if USE_HCACHE
 WHERE char *HeaderCache;
 #if HAVE_GDBM || HAVE_DB4
-WHERE char *HeaderCachePageSize;
+WHERE long  HeaderCachePageSize;
 #endif /* HAVE_GDBM || HAVE_DB4 */
 #endif /* USE_HCACHE */
 WHERE char *MarkMacroPrefix;
diff --git a/hcache.c b/hcache.c
index 492d5701..2f601102 100644
--- a/hcache.c
+++ b/hcache.c
@@ -1188,7 +1188,8 @@ hcache_open_gdbm (struct header_cache* h, const char* path)
 {
   int pagesize;
 
-  if (mutt_atoi (HeaderCachePageSize, &pagesize) < 0 || pagesize <= 0)
+  pagesize = HeaderCachePageSize;
+  if (pagesize <= 0)
     pagesize = 16384;
 
   h->db = gdbm_open((char *) path, pagesize, GDBM_WRCREAT, 00600, NULL);
diff --git a/init.h b/init.h
index 7d530ef5..041806b1 100644
--- a/init.h
+++ b/init.h
@@ -1167,7 +1167,7 @@ struct option_t MuttVars[] = {
   */
 #endif /* HAVE_QDBM */
 #if defined(HAVE_GDBM) || defined(HAVE_DB4)
-  { "header_cache_pagesize", DT_STR, R_NONE, {.p=&HeaderCachePageSize}, {.p="16384"} },
+  { "header_cache_pagesize", DT_LNUM, R_NONE, {.p=&HeaderCachePageSize}, {.l=16384} },
   /*
   ** .pp
   ** When mutt is compiled with either gdbm or bdb4 as the header cache backend,