Dragged in a bunch of alignment fixes from LL. Should allow disabling of tcmalloc on windows/linux32 if such is ever implemented.

indra/llmath/llplane.h

@@ -42,6 +42,8 @@
 // The plane normal = [A, B, C]
 // The closest approach = D / sqrt(A*A + B*B + C*C)
 
+
+LL_ALIGN_PREFIX(16)
 class LLPlane
 {
 public:
@@ -100,7 +102,7 @@ public:
 		
 private:
 	LLVector4a mV;
-};
+} LL_ALIGN_POSTFIX(16);