Fix potential use of uninitialized variable.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65109 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/scan-build b/utils/scan-build
index fc6407e213f4ed75f8d182936d21dd0e032a15b4..4f2a68ff9ea20a86cfdff5b928a2b239909bb3f9 100755 (executable)
--- a/utils/scan-build
+++ b/utils/scan-build
@@ -84,7 +84,7 @@ sub DieDiag {
 my $ClangSB = Cwd::realpath("$RealBin/cbin/clang");
 my $Clang = $ClangSB;
 
-if (! -x $ClangSB) {
+if (!defined $ClangSB || ! -x $ClangSB) {
   $Clang = "clang";
 }