fixed compiler warnings issued by:

gcc 4.3
	curl.h gcc type-checking
	glibc with enabled FORTIFY_SOURCE checking

src/pluto/ac.c

@@ -860,7 +860,7 @@ load_acerts(void)
 	}
     }
     /* restore directory path */
-    chdir(save_dir);
+    ignore_result(chdir(save_dir));
 }
 
 /*

src/pluto/ca.c

@@ -295,7 +295,7 @@ load_authcerts(const char *type, const char *path, u_char auth_flags)
 	}
     }
     /* restore directory path */
-    chdir(save_dir);
+    ignore_result(chdir(save_dir));
 }
 
 /*

src/pluto/crl.c

@@ -373,7 +373,7 @@ load_crls(void)
 	}
     }
     /* restore directory path */
-    chdir(save_dir);
+    ignore_result(chdir(save_dir));
 }
 
 /*

src/pluto/defs.c

@@ -249,6 +249,7 @@ write_chunk(const char *filename, const char *label, chunk_t ch
 {
     mode_t oldmask;
     FILE *fd;
+    size_t written;
 
     if (!force)
     {
@@ -268,8 +269,14 @@ write_chunk(const char *filename, const char *label, chunk_t ch
 
     if (fd)
     {
-	fwrite(ch.ptr, sizeof(u_char), ch.len, fd);
+	written = fwrite(ch.ptr, sizeof(u_char), ch.len, fd);
 	fclose(fd);
+	if (written != ch.len)
+	{
+	    plog("  writing to %s file '%s' failed", label, filename);
+	    umask(oldmask);
+	    return FALSE;
+	}
 	plog("  written %s file '%s' (%d bytes)", label, filename, (int)ch.len);
 	umask(oldmask);
 	return TRUE;

src/pluto/fetch.c

@@ -324,7 +324,7 @@ fetch_curl(char *url, chunk_t *blob)
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buffer);
 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&response);
-	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, &errorbuffer);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorbuffer);
 	curl_easy_setopt(curl, CURLOPT_FAILONERROR, TRUE);
 	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, FETCH_CMD_TIMEOUT);
 
@@ -705,9 +705,9 @@ fetch_ocsp_status(ocsp_location_t* location)
 	curl_easy_setopt(curl, CURLOPT_URL, uri);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buffer);
 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&response);
-	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, request.ptr);
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, (void*)request.ptr);
 	curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, request.len);
-	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, &errorbuffer);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorbuffer);
 	curl_easy_setopt(curl, CURLOPT_FAILONERROR, TRUE);
 	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, FETCH_CMD_TIMEOUT);