Fix perl segfault due to changes in header callback behaviour since curl-7.8.1-pre3

perl/Curl_easy/Changes

 Revision history for Perl extension Curl::easy.
 Check out the file README for more info.
 
+1.1.6  Mon Sep 10 2001: - Cris Bailiff <c.bailiff@devsecure.com>
+    - Fix segfault due to changes in header callback behaviour
+      since curl-7.8.1-pre3
+
 1.1.5  Fri Apr 20 2001: - Cris Bailiff <c.bailiff@devsecure.com>
     - Add latest CURLOPT_ and CURLINFO_ constants to the constants list
 

perl/Curl_easy/easy.pm

@@ -110,7 +110,7 @@ CURLINFO_CONTENT_LENGTH_UPLOAD
 USE_INTERNAL_VARS
 );
 
-$VERSION = '1.1.5';
+$VERSION = '1.1.6';
 
 $Curl::easy::headers = "";
 $Curl::easy::content = "";
@@ -254,7 +254,7 @@ indicate an error.
  
 Georg Horn <horn@koblenz-net.de>
  
-Additional callback,pod and tes work by Cris Bailiff <c.bailiff@devsecure.com>
+Additional callback,pod and test work by Cris Bailiff <c.bailiff@devsecure.com>
 and Forrest Cahoon <forrest.cahoon@merrillcorp.com>
 
 =head1 SEE ALSO

perl/Curl_easy/easy.xs

@@ -101,12 +101,14 @@ fwrite_wrapper (const void *ptr,
 
 	if (stream == stdout) {
 	    sv = newSViv(0);	/* FIXME: should cast stdout to GLOB somehow? */
-	} else {		/* its already an SV */
+	} else if (stream == NULL) {
+            sv = &PL_sv_undef;
+        } else {		/* its already an SV */
 	    sv = stream;
 	}
 
 	if (ptr != NULL) {
-	    XPUSHs(sv_2mortal(newSVpvn(ptr, size * nmemb)));
+	    XPUSHs(sv_2mortal(newSVpvn((char *)ptr, (STRLEN)(size * nmemb))));
 	} else {
 	    XPUSHs(sv_2mortal(newSVpv("", 0)));
 	}
@@ -130,15 +132,20 @@ fwrite_wrapper (const void *ptr,
     } else {
 	/* default to a normal 'fwrite' */
 	/* stream could be a FILE * or an SV * */
+        /* or NULL since libcurl-7.8.1pre3  */
 	FILE *f;
 
-	if (stream == stdout) {	/* the only possible FILE ? Think so */
+	if (stream == stdout ||
+            stream == NULL) { /* the only possible FILE ? Think so */
 	    f = stream;
 	} else {		/* its a GLOB */
 	    f = IoIFP(sv_2io(stream));	/* may barf if not a GLOB */
 	}
 
-	return fwrite(ptr, size, nmemb, f);
+	if (f)
+           return fwrite(ptr, size, nmemb, f);
+	else
+           return (size_t) size*nmemb;
     }
 }