Merge commit 'fc43c19a'

* commit 'fc43c19a':
  matroska: Update the available size after lace parsing
  clang: use -fsantize=address and -fsanitize=thread
Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -2460,13 +2460,13 @@ sysinclude_default="${sysroot}/usr/include"
 case "$toolchain" in
     clang-asan)
         cc_default="clang"
-        add_cflags  -faddress-sanitizer
-        add_ldflags -faddress-sanitizer
+        add_cflags  -fsanitize=address
+        add_ldflags -fsanitize=address
     ;;
     clang-tsan)
         cc_default="clang"
-        add_cflags  -fthread-sanitizer
-        add_ldflags -fthread-sanitizer
+        add_cflags  -fsanitize=thread -pie
+        add_ldflags -fsanitize=thread -pie
     ;;
     msvc)
         cc_default="c99wrap cl"