Issue #18227: "Free" function of bz2, lzma and zlib modules has no return value (void)

Modules/_bz2module.c

@@ -263,7 +263,7 @@ BZ2_Malloc(void* ctx, int items, int size)
 static void
 BZ2_Free(void* ctx, void *ptr)
 {
-    return PyMem_RawFree(ptr);
+    PyMem_RawFree(ptr);
 }
 
 static int

Modules/_lzmamodule.c

@@ -132,7 +132,7 @@ PyLzma_Malloc(void *opaque, size_t items, size_t size)
 static void
 PyLzma_Free(void *opaque, void *ptr)
 {
-    return PyMem_RawFree(ptr);
+    PyMem_RawFree(ptr);
 }
 
 #if BUFSIZ < 8192

Modules/zlibmodule.c

@@ -149,7 +149,7 @@ PyZlib_Malloc(voidpf ctx, uInt items, uInt size)
 static void
 PyZlib_Free(voidpf ctx, void *ptr)
 {
-    return PyMem_RawFree(ptr);
+    PyMem_RawFree(ptr);
 }
 
 PyDoc_STRVAR(compress__doc__,