Fix tests based on coverity reports (#819)

* Partial #818, unused arg

* Partial #818, init var

* partail #818, fix va_args usage

* partail #818, handle f* calls and avoid possible call to malloc with negative values

* partail #818, prevent double free

* partail #818, resource leak if test fail

* partail #818, null deref fix

* partail #818, avoid double free on fp failure

* Partial #818, fix error msg

* Partial #818, leak on error

* Partial #818, null deref

* Partial #818, avoid possible negative index on failure

* partial #818, does not free if we return if requested new size overflow

* partial #818, avoid double free, free where the alloc happened

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/tga/heap_overflow.c b/tests/tga/heap_overflow.c
index ddd4b63..119eb23 100644
--- a/tests/tga/heap_overflow.c
+++ b/tests/tga/heap_overflow.c
@@ -28,7 +28,9 @@ static void check_file(char *basename)
 
     size = read_test_file(&buffer, basename);
     im = gdImageCreateFromTgaPtr(size, (void *) buffer);
-    gdTestAssert(im == NULL);
+    if (!gdTestAssert(im == NULL)) {
+        gdImageDestroy(im);
+    }
     free(buffer);
 }