Merge commit 'cb49bb10'

* commit 'cb49bb10':
  build: Move -Wcast-qual to the extra_warnings
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

configure

@@ -5711,6 +5711,7 @@ check_cflags -Wno-pointer-to-int-cast
 check_cflags -Wstrict-prototypes
 check_cflags -Wempty-body
 enabled extra_warnings && check_cflags -Winline
+enabled extra_warnings && check_cflags -Wcast-qual
 
 check_disable_warning(){
     warning_flag=-W${1#-Wno-}