[PATCH 1/1] fit: check return value of fit_image_get_data_size()

[Heinrich Schuchardt]

GCC-10 reports:

In file included from tools/common/image-fit.c:1:
include/image.h: In function ‘fit_image_get_data_and_size’:
./tools/../common/image-fit.c:1015:9: warning: ‘len’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
 1015 |   *size = len;
      |   ~~~~~~^~~~~
./tools/../common/image-fit.c:996:6: note: ‘len’ was declared here
  996 |  int len;
      |      ^~~

Add the missing check of the return value of fit_image_get_data_size().

Fixes: c3c863880479 ("add FIT data-position & data-offset property support")
Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 common/image-fit.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/common/image-fit.c b/common/image-fit.c
index f3bb00c98a..4435bc4f1d 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -1011,8 +1011,10 @@ int fit_image_get_data_and_size(const void *fit, int noffset,
 	if (external_data) {
 		debug("External Data\n");
 		ret = fit_image_get_data_size(fit, noffset, &len);
-		*data = fit + offset;
-		*size = len;
+		if (!ret) {
+			*data = fit + offset;
+			*size = len;
+		}
 	} else {
 		ret = fit_image_get_data(fit, noffset, data, size);
 	}
--
2.25.1