Merge commit '0ce3761c781f2c2de40a5a8a99563878804f47cc'

* commit '0ce3761c781f2c2de40a5a8a99563878804f47cc':
  configure: Add stdlib.h #include to CPPFLAGS check helper functions

Merged-by: James Almer <jamrial@gmail.com>

configure

@@ -1040,7 +1040,7 @@ check_code(){
 check_cppflags(){
     log check_cppflags "$@"
     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
-int x;
+#include <stdlib.h>
 EOF
 }
 
@@ -1424,7 +1424,7 @@ check_host_cpp(){
 check_host_cppflags(){
     log check_host_cppflags "$@"
     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
-int x;
+#include <stdlib.h>
 EOF
 }