Mesa (master): util: Include string.h in bitscan.h.

[Vinson Lee]

Module: Mesa
Branch: master
Commit: 889ee4da05400687a6c5296a7632dc26f1d61924
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=889ee4da05400687a6c5296a7632dc26f1d61924

Author: Vinson Lee <vlee at freedesktop.org>
Date:   Wed Oct 19 18:03:12 2016 -0700

util: Include string.h in bitscan.h.

Fix build error with clang.

  Compiling src/compiler/glsl/link_varyings.cpp ...
In file included from src/compiler/glsl/link_varyings.cpp:33:
In file included from src/compiler/glsl/glsl_symbol_table.h:34:
In file included from src/compiler/glsl/ir.h:33:
In file included from src/compiler/glsl_types.h:29:
/usr/include/string.h:518:12: error: exception specification in declaration does not match previous declaration
extern int ffs (int __i) __THROW __attribute__ ((__const__));
           ^
src/util/bitscan.h:51:13: note: expanded from macro 'ffs'
            ^
src/util/bitscan.h:96:18: note: previous declaration is here
   const int i = ffs(*mask) - 1;
                 ^
src/util/bitscan.h:51:13: note: expanded from macro 'ffs'
            ^

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97952
Signed-off-by: Vinson Lee <vlee at freedesktop.org>
Reviewed-by: Timothy Arceri <timothy.arceri at collabora.com>

---

 src/util/bitscan.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/util/bitscan.h b/src/util/bitscan.h
index 8afef81..a5dfa1f 100644
--- a/src/util/bitscan.h
+++ b/src/util/bitscan.h
@@ -31,6 +31,7 @@
 
 #include <assert.h>
 #include <stdint.h>
+#include <string.h>
 
 #if defined(_MSC_VER)
 #include <intrin.h>