Replace create_from_file with empty blob if HB_NO_OPEN is defined

src/main.cc

diff --git a/src/main.cc b/src/main.cc
index 490b76e..0aa4a5b 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -38,6 +38,10 @@
 
 using namespace OT;
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {

src/test-buffer-serialize.cc

diff --git a/src/test-buffer-serialize.cc b/src/test-buffer-serialize.cc
index 28826be..6393f0b 100644
--- a/src/test-buffer-serialize.cc
+++ b/src/test-buffer-serialize.cc
@@ -34,6 +34,10 @@
 
 #include <stdio.h>
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {

src/test-gpos-size-params.cc

diff --git a/src/test-gpos-size-params.cc b/src/test-gpos-size-params.cc
index acd1c4f..ad10ed4 100644
--- a/src/test-gpos-size-params.cc
+++ b/src/test-gpos-size-params.cc
@@ -31,6 +31,10 @@
 
 #include <stdio.h>
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {

src/test-gsub-would-substitute.cc

diff --git a/src/test-gsub-would-substitute.cc b/src/test-gsub-would-substitute.cc
index 268f7db..7ad9e08 100644
--- a/src/test-gsub-would-substitute.cc
+++ b/src/test-gsub-would-substitute.cc
@@ -35,6 +35,10 @@
 #include "hb-ft.h"
 #endif
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {

src/test-ot-color.cc

diff --git a/src/test-ot-color.cc b/src/test-ot-color.cc
index e9126c0..3b4c8b6 100644
--- a/src/test-ot-color.cc
+++ b/src/test-ot-color.cc
@@ -27,6 +27,10 @@
 
 #include <cairo.h>
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 #if !defined(HB_NO_COLOR) && defined(CAIRO_HAS_SVG_SURFACE)
 
 #include "hb-ot.h"

src/test-ot-name.cc

diff --git a/src/test-ot-name.cc b/src/test-ot-name.cc
index 44c2c17..4a484c6 100644
--- a/src/test-ot-name.cc
+++ b/src/test-ot-name.cc
@@ -30,6 +30,10 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {

src/test.cc

diff --git a/src/test.cc b/src/test.cc
index f0eace8..65b469f 100644
--- a/src/test.cc
+++ b/src/test.cc
@@ -34,6 +34,10 @@
 #include "hb-ft.h"
 #endif
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {