Merge remote-tracking branch 'turbo/master'

* turbo/master: (105 commits)
  makemacpkg.in: Allow universal DMG w/o ARMv8 arch
  Remove more unnecessary NULL checks before free()
  Eliminate unnecessary NULL checks before tjFree()
  Eliminate unnecessary NULL checks before free()
  simd/arm64/jsimd_neon.S: Fix checkstyle issue
  tjTransform(): Use instance err. for bad crop spec
  README.md, package specs: Various tweaks
  djpeg.c: Fix compiler warning w/o mem. src manager
  ARMv8 SIMD: Support execute-only memory (XOM)
  Travis: Use MacPorts instead of Homebrew
  Huffman enc.: Fix very rare local buffer overrun
  TurboJPEG: Fix erroneous subsampling detection
  ChangeLog.md: List CVE IDs for specific fixes
  tjDecompressToYUV*(): Fix OOB write/double free
  64-bit tjbench: Fix signed int overflow/segfault
  Fix copyright header formatting buglets
  example.txt: Avoid undefined setjmp() behavior
  Mac: Support hiding SIMD fct symbols w/ NASM 2.14+
  TJBench: Fix output with -componly -quiet
  Build: Don't require ASM_NASM if !REQUIRE_SIMD
  ...

cjpeg.c

@@ -879,12 +879,10 @@ main(int argc, char **argv)
 
   if (memdst) {
     fprintf(stderr, "Compressed size:  %lu bytes\n", outsize);
-    if (outbuffer != NULL)
-      free(outbuffer);
+    free(outbuffer);
   }
 
-  if (icc_profile != NULL)
-    free(icc_profile);
+  free(icc_profile);
 
   /* All done. */
   exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);