--- pgp/src/zdeflate.c	2018/04/24 16:38:50	1.1.1.2
+++ pgp/src/zdeflate.c	2018/04/24 16:39:33	1.1.1.3
@@ -68,6 +68,7 @@
  *          attributes.
  */
 
+#include "zunzip.h"
 #include "zip.h"
 
 /* ===========================================================================
@@ -140,7 +141,7 @@ typedef unsigned IPos;
 #else
   uch    far * near window = NULL;
   Pos    far * near prev   = NULL;
-  Pos    far * near head;
+  static Pos    far * near head;
 #endif
 
 long block_start;
@@ -163,7 +164,7 @@ unsigned int near prev_length;
  */
 
       unsigned near strstart;      /* start of string to insert */
-      unsigned near match_start;   /* start of matching string */
+unsigned near match_start;         /* start of matching string */
 local int      near eofile;        /* flag set at end of input file */
 local unsigned near lookahead;     /* number of valid bytes ahead in window */
 
@@ -235,6 +236,7 @@ local void fill_window   OF((void));
 local  void check_match OF((IPos start, IPos match, int length));
 #endif
 
+#undef MIN
 #define MIN(a,b) ((a) <= (b) ? (a) : (b))
 /* The arguments must not have side effects. */
 
@@ -272,15 +274,13 @@ void lm_init (pack_level, flags)
 
     /* Use dynamic allocation if compiler does not like big static arrays: */
 #ifdef DYN_ALLOC
-    if (window == NULL) {
-        window = (uch far*) fcalloc(WSIZE,   2*sizeof(uch));
-        prev   = (Pos far*) fcalloc(WSIZE,     sizeof(Pos));
-        head   = (Pos far*) fcalloc(HASH_SIZE, sizeof(Pos));
-
-        if (window == NULL || prev == NULL || head == NULL) {
-            err(ZE_MEM, "window allocation");
-        }
-    }
+	window = (uch far*) fcalloc(WSIZE,   2*sizeof(uch));
+	prev   = (Pos far*) fcalloc(WSIZE,     sizeof(Pos));
+	head   = (Pos far*) fcalloc(HASH_SIZE, sizeof(Pos));
+
+	if (window == NULL || prev == NULL || head == NULL) {
+		err(ZE_MEM, "window allocation");
+	}
 #endif /* DYN_ALLOC */
 #ifdef ASM
     match_init(); /* initialize the asm code */
@@ -323,6 +323,17 @@ void lm_init (pack_level, flags)
      */
 }
 
+void lm_free()
+{
+#ifdef DYN_ALLOC
+	free(window);
+	free(prev);
+	free(head);
+	window = NULL;
+	prev = head = NULL;
+#endif
+}
+
 /* ===========================================================================
  * Set match_start to the longest match starting at the given string and
  * return its length. Matches shorter or equal to prev_length are discarded,