Initialize coordinates to zero

Author: radarhere

Tests/test_imagepath.py

@@ -90,6 +90,7 @@ def test_path_odd_number_of_coordinates():
     [
         ([0, 1, 2, 3], (0.0, 1.0, 2.0, 3.0)),
         ([3, 2, 1, 0], (1.0, 0.0, 3.0, 2.0)),
+        (1, (0.0, 0.0, 0.0, 0.0)),
     ],
 )
 def test_getbbox(coords, expected):

src/path.c

@@ -57,7 +57,7 @@ alloc_array(Py_ssize_t count) {
     if ((unsigned long long)count > (SIZE_MAX / (2 * sizeof(double))) - 1) {
         return ImagingError_MemoryError();
     }
-    xy = malloc(2 * count * sizeof(double) + 1);
+    xy = calloc(2 * count * sizeof(double) + 1, sizeof(double));
     if (!xy) {
         ImagingError_MemoryError();
     }