evas_test_image: Fix resource leak

Summary:
Coverity reports that we leak variable 'f' going out of scope here, so
if we are going to exit the test, lets close the file before we do

Fixes CID1400945

@fix
Depends on D8770

Reviewers: raster, cedric, zmike, bu5hm4n, segfaultxavi

Reviewed By: segfaultxavi

Subscribers: segfaultxavi, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D8771

src/tests/evas/evas_test_image.c

@@ -647,6 +647,7 @@ _file_to_memory(const char *filename, char **result)
    if ((size_t)size != fread(*result, sizeof(char), size, f))
      {
         free(*result);
+        fclose(f);
         return -1;
      }
    fclose(f);