[OpenMP] Fix build of stubs library, NFC.

Both Clang and GCC complained that they cannot initialize a return
object of type 'kmp_proc_bind_t' with an 'int'. While at it, also
fix a warning about missing parentheses thrown by Clang.

Differential Revision: https://reviews.llvm.org/D65284

git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@367041 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/runtime/src/kmp_stub.cpp b/runtime/src/kmp_stub.cpp
index badbbde..6b50419 100644
--- a/runtime/src/kmp_stub.cpp
+++ b/runtime/src/kmp_stub.cpp
@@ -164,7 +164,7 @@
 #if KMP_OS_WINDOWS
   res = _aligned_malloc(sz, a);
 #else
-  if (err = posix_memalign(&res, a, sz)) {
+  if ((err = posix_memalign(&res, a, sz))) {
     errno = err; // can be EINVAL or ENOMEM
     res = NULL;
   }
@@ -277,7 +277,7 @@
 
 kmp_proc_bind_t __kmps_get_proc_bind(void) {
   i;
-  return 0;
+  return proc_bind_false;
 } // __kmps_get_proc_bind
 
 double __kmps_get_wtime(void) {