uint16_t is 2 bytes wide - only read 2 bytes from mem

Author: ellert

src/isal/isal_zlibmodule.c

@@ -1643,7 +1643,7 @@ static inline uint32_t load_u32_le(void *address) {
 static inline uint16_t load_u16_le(void *address) {
     #if PY_BIG_ENDIAN
     uint8_t *mem = address;
-    return mem[0] | (mem[1] << 8) | (mem[2] << 16) | (mem[3] << 24);
+    return mem[0] | (mem[1] << 8);
     #else
     return *(uint16_t *)address;
     #endif