[cairo] [PATCH] src and test: Fix issues reported by cppcheck static analysis tool

[Ravi Nanjundappa]

cppcheck analysis tool reports the following issues when run on the
latest Cairo source.
$ grep "(error)"  cppcheck_error_log.txt
[src/skia/cairo-skia-surface.cpp:245]: (error) Memory leak: surface
[test/pdf-mime-data.c:58]: (error) Possible null pointer dereference: file - otherwise it is redundant to check if file is null at line 53
[test/pdf-mime-data.c:75]: (error) Resource leak: fp
$

The proposed changes fixes the above issues.

Signed-off-by: Ravi Nanjundappa <nravi.n at samsung.com>
---
 src/skia/cairo-skia-surface.cpp |    4 +++-
 test/pdf-mime-data.c            |   10 +++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/skia/cairo-skia-surface.cpp b/src/skia/cairo-skia-surface.cpp
index 9b16bd2..834a2f1 100644
--- a/src/skia/cairo-skia-surface.cpp
+++ b/src/skia/cairo-skia-surface.cpp
@@ -241,8 +241,10 @@ _cairo_skia_surface_create_internal (SkBitmap::Config config,
     pixman_image = pixman_image_create_bits (pixman_format,
 					     width, height,
 					     (uint32_t *) data, stride);
-    if (unlikely (pixman_image == NULL))
+    if (unlikely (pixman_image == NULL)) {
+	free (surface);
 	return (cairo_skia_surface_t *) _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+    }
 
     _cairo_surface_init (&surface->image.base,
 			 &cairo_skia_surface_backend,
diff --git a/test/pdf-mime-data.c b/test/pdf-mime-data.c
index e2c529e..dba72fd 100644
--- a/test/pdf-mime-data.c
+++ b/test/pdf-mime-data.c
@@ -50,7 +50,7 @@ read_file (const cairo_test_context_t *ctx,
     FILE *fp;
 
     fp = fopen (file, "rb");
-    if (file == NULL) {
+    if (fp == NULL) {
 	char filename[4096];
 
 	/* try again with srcdir */
@@ -71,11 +71,15 @@ read_file (const cairo_test_context_t *ctx,
     *len = ftell(fp);
     fseek (fp, 0, SEEK_SET);
     *data = malloc (*len);
-    if (*data == NULL)
+    if (*data == NULL) {
+	fclose(fp);
 	return CAIRO_TEST_NO_MEMORY;
+    }
 
-    if (fread(*data, *len, 1, fp) != 1)
+    if (fread(*data, *len, 1, fp) != 1) {
+	fclose(fp);
 	return CAIRO_TEST_FAILURE;
+    }
 
     fclose(fp);
     return CAIRO_TEST_SUCCESS;
-- 
1.7.9.5