Fixed comparison between int and unsigned long

src/_imaging.c

@@ -3928,7 +3928,7 @@ _set_blocks_max(PyObject* self, PyObject* args)
             "blocks_max should be greater than 0");
         return NULL;
     }
-    else if ( blocks_max > SIZE_MAX/sizeof(ImagingDefaultArena.blocks_pool[0])) {
+    else if ( (unsigned long)blocks_max > SIZE_MAX/sizeof(ImagingDefaultArena.blocks_pool[0])) {
         PyErr_SetString(PyExc_ValueError,
             "blocks_max is too large");
         return NULL;

src/libImaging/Draw.c

@@ -1630,7 +1630,7 @@ allocate(ImagingOutline outline, int extra)
             /* malloc check ok, uses calloc for overflow */
             e = calloc(outline->size, sizeof(Edge));
         } else {
-            if (outline->size > INT_MAX / sizeof(Edge)) {
+            if (outline->size > INT_MAX / (int)sizeof(Edge)) {
                 return NULL;
             }
             /* malloc check ok, overflow checked above */

src/libImaging/RankFilter.c

@@ -72,7 +72,7 @@ ImagingRankFilter(Imaging im, int size, int rank)
 
     /* malloc check ok, for overflow in the define below */
     if (size > INT_MAX / size ||
-        size > INT_MAX / (size * sizeof(FLOAT32))) {
+        size > INT_MAX / (size * (int)sizeof(FLOAT32))) {
         return (Imaging) ImagingError_ValueError("filter size too large");
     }
 

src/libImaging/Resample.c

@@ -208,7 +208,7 @@ precompute_coeffs(int inSize, float in0, float in1, int outSize,
     ksize = (int) ceil(support) * 2 + 1;
 
     // check for overflow
-    if (outSize > INT_MAX / (ksize * sizeof(double))) {
+    if (outSize > INT_MAX / (ksize * (int)sizeof(double))) {
         ImagingError_MemoryError();
         return 0;
     }