misc minor changes

- make cmake osx use of -ftemplate-depth match scons.
- use array size within sizeof(), more compact.
- replace AT with __func__ where the function is unique enough.
- BLI_box_pack_2D -> 2d to match other functions.
- rename new mesh normal calculation to mesh.calc_normals_split()

CMakeLists.txt

@@ -1784,8 +1784,14 @@ elseif(APPLE)
 		set(CMAKE_CXX_FLAGS_RELEASE "-mdynamic-no-pic -fno-strict-aliasing")
 	endif()
 
-	# Xcode 5 has too low template depth of 128 for libmv
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ftemplate-depth=1024")
+	if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+		if(${CMAKE_GENERATOR} MATCHES "Xcode")
+			if(${XCODE_VERSION} VERSION_EQUAL 5 OR ${XCODE_VERSION} VERSION_GREATER 5)
+				# Xcode 5 has too low template depth of 128 for libmv
+				set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ftemplate-depth=1024")
+			endif()
+		endif()
+	endif()
 endif()
 
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