--- zip.c.orig	2014-06-10 18:55:32.778807408 +0200
+++ zip.c	2014-06-11 20:27:18.355848501 +0200
@@ -186,7 +186,7 @@
 #include "crypt.h"
 #endif
 
-local linkedlist_datablock_internal* allocate_new_datablock()
+local linkedlist_datablock_internal* allocate_new_datablock(void)
 {
     linkedlist_datablock_internal* ldi;
     ldi = (linkedlist_datablock_internal*)
@@ -238,7 +238,7 @@
     }
 
     ldi = ll->last_block;
-    from_copy = (unsigned char*)buf;
+    from_copy = (const unsigned char*)buf;
 
     while (len>0)
     {
@@ -637,7 +637,7 @@
   return relativeOffset;
 }
 
-int LoadCentralDirectoryRecord(zip64_internal* pziinit)
+local int LoadCentralDirectoryRecord(zip64_internal* pziinit)
 {
   int err=ZIP_OK;
   ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
@@ -955,7 +955,7 @@
     return zipOpen3(pathname,append,NULL,NULL);
 }
 
-int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
+local int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
 {
   /* write the local header */
   int err;
@@ -1416,7 +1416,7 @@
 #ifdef HAVE_BZIP2
     if(zi->ci.method == Z_BZIP2ED && (!zi->ci.raw))
     {
-      zi->ci.bstream.next_in = (void*)buf;
+      zi->ci.bstream.next_in = buf;
       zi->ci.bstream.avail_in = len;
       err = BZ_RUN_OK;
 
@@ -1450,7 +1450,7 @@
     else
 #endif
     {
-      zi->ci.stream.next_in = (Bytef*)buf;
+      zi->ci.stream.next_in = buf;
       zi->ci.stream.avail_in = len;
 
       while ((err==ZIP_OK) && (zi->ci.stream.avail_in>0))
@@ -1752,7 +1752,7 @@
     return zipCloseFileInZipRaw (file,0,0);
 }
 
-int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
+local int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
 {
   int err = ZIP_OK;
   ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writting_offset;
@@ -1774,7 +1774,7 @@
     return err;
 }
 
-int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
+local int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
 {
   int err = ZIP_OK;
 
@@ -1813,7 +1813,8 @@
   }
   return err;
 }
-int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
+
+local int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
 {
   int err = ZIP_OK;
 
@@ -1861,7 +1862,7 @@
    return err;
 }
 
-int Write_GlobalComment(zip64_internal* zi, const char* global_comment)
+local int Write_GlobalComment(zip64_internal* zi, const char* global_comment)
 {
   int err = ZIP_OK;
   uInt size_global_comment = 0;
@@ -1879,6 +1880,18 @@
   return err;
 }
 
+extern int ZEXPORT zipFlush (zipFile file)
+{
+    zip64_internal* zi;
+
+    if (file == NULL)
+        return ZIP_PARAMERROR;
+
+    zi = (zip64_internal*)file;
+
+    return ZFLUSH64(zi->z_filefunc,zi->filestream);
+}
+
 extern int ZEXPORT zipClose (zipFile file, const char* global_comment)
 {
     zip64_internal* zi;