Heretic: Use HHEVER lump to set HHE version for HEHACKED lumps

src/heretic/d_main.c

@@ -1188,6 +1188,13 @@ void D_DoomMain(void)
         }
     }
 
+    // [crispy] load version number from HHEVER lump if it exists.
+    // -hhever parm takes priority, even if it's invalid
+    if (W_CheckNumForName("HHEVER") != -1 && !M_ParmExists("-hhever"))
+    {
+        SetHHEVersionFromLump(W_CheckNumForName("HHEVER"));
+    }
+
     if (W_CheckNumForName("HEHACKED") != -1)
     {
         DEH_LoadLumpByName("HEHACKED", true, true);

src/heretic/deh_htic.c

@@ -24,6 +24,8 @@
 #include "deh_htic.h"
 #include "info.h"
 #include "m_argv.h"
+#include "w_wad.h" // [crispy]
+#include "z_zone.h" // [crispy]
 
 const char *deh_signatures[] =
 {
@@ -80,6 +82,18 @@ static void SetHHEVersionByName(const char *name)
     }
 }
 
+// [crispy] read an HHEVER lump if one exists
+// let SetHHEVersionByName figure out if it's vaild or not
+void SetHHEVersionFromLump(int lumpnum)
+{
+    char *data = NULL;
+
+    data = W_CacheLumpNum(lumpnum, PU_CACHE);
+    SetHHEVersionByName(data);
+
+    return;
+}
+
 // Initialize Heretic(HHE)-specific dehacked bits.
 
 void DEH_HereticInit(void)

src/heretic/deh_htic.h

@@ -45,6 +45,7 @@ void DEH_HereticInit(void);
 int DEH_MapHereticThingType(int type);
 int DEH_MapHereticFrameNumber(int frame);
 void DEH_SuggestHereticVersion(deh_hhe_version_t version);
+void SetHHEVersionFromLump(int lumpnum);
 
 extern deh_hhe_version_t deh_hhe_version;