Build: C++ headers: Replace PR #366 with a more directed version.

glslang/Include/PoolAlloc.h

@@ -61,13 +61,13 @@
 // class as the allocator (second) template argument.
 //
 
-#include <stddef.h>
-#include <string.h>
+#include <cstddef>
+#include <cstring>
 #include <vector>
 
 namespace glslang {
 
-// If we are using guard blocks, we must track each indivual
+// If we are using guard blocks, we must track each individual
 // allocation.  If we aren't using guard blocks, these
 // never get instantiated, so won't have any impact.
 //