Added checks for the malloc call results in operator new.

The operator new is not supposed to return null pointers, so throw
bad_alloc when malloc returns null. This should avoid segmentation
faults if malloc fails.

Author: Lastique

test/threads/thread/constr/FArgs_pass.cpp

@@ -40,7 +40,9 @@ void* operator new(std::size_t s) throw (std::bad_alloc)
   //std::cout << __FILE__ << ":" << __LINE__ << std::endl;
   if (throw_one == 0) throw std::bad_alloc();
   --throw_one;
-  return std::malloc(s);
+  void* p = std::malloc(s);
+  if (!p) throw std::bad_alloc();
+  return p;
 }
 
 #if defined BOOST_MSVC

test/threads/thread/constr/F_pass.cpp

@@ -40,7 +40,9 @@ void* operator new(std::size_t s) throw (std::bad_alloc)
   //std::cout << __FILE__ << ":" << __LINE__ << std::endl;
   if (throw_one == 0) throw std::bad_alloc();
   --throw_one;
-  return std::malloc(s);
+  void* p = std::malloc(s);
+  if (!p) throw std::bad_alloc();
+  return p;
 }
 
 #if defined BOOST_MSVC

test/threads/thread/constr/lambda_pass.cpp

@@ -41,7 +41,9 @@ void* operator new(std::size_t s) throw (std::bad_alloc)
 {
   if (throw_one == 0) throw std::bad_alloc();
   --throw_one;
-  return std::malloc(s);
+  void* p = std::malloc(s);
+  if (!p) throw std::bad_alloc();
+  return p;
 }
 
 #if defined BOOST_MSVC