fix for FS#204

* gdImageCreateFrom*() returns null if null pointer given
* gdImage*() puts nothing if null pointer given

3 files changed, 28 insertions, 0 deletions

diff --git a/tests/bmp/CMakeLists.txt b/tests/bmp/CMakeLists.txt
new file mode 100644
index 0000000..67fb082
--- /dev/null
+++ b/tests/bmp/CMakeLists.txt
@@ -0,0 +1,11 @@
+
+SET(TESTS_FILES
+	bmp_null
+)
+
+FOREACH(test_name ${TESTS_FILES})
+	add_executable(${test_name} "${test_name}.c")
+	target_link_libraries (${test_name} ${GDTESTS_TARGET_LINK})
+	get_target_property(test_path ${test_name} LOCATION)
+	ADD_TEST(${test_name} ${test_path})
+ENDFOREACH(test_name)
diff --git a/tests/bmp/Makefile.am b/tests/bmp/Makefile.am
new file mode 100644
index 0000000..c18a2e5
--- /dev/null
+++ b/tests/bmp/Makefile.am
@@ -0,0 +1,3 @@
+## Process this file with automake to produce Makefile.in -*-Makefile-*-
+
+EXTRA_DIST = CMakeLists.txt bmp_null.c
diff --git a/tests/bmp/bmp_null.c b/tests/bmp/bmp_null.c
new file mode 100644
index 0000000..3de7731
--- /dev/null
+++ b/tests/bmp/bmp_null.c
@@ -0,0 +1,14 @@
+#include <gd.h>
+
+int main()
+{
+	gdImagePtr im;
+
+	im = gdImageCreateFromBmp(NULL);
+	if (im != NULL) {
+		gdImageDestroy(im);
+		return 1;
+	}
+	gdImageBmp(im, NULL, 0); /* noop safely */
+	return 0;
+}