Merge pull request aeron-io#262 from lcs777/master

Adding namespace to include guard in order to avoid name collisions.

Author: tmontgomery

main/java/uk/co/real_logic/sbe/generation/cpp98/Cpp98Generator.java

@@ -695,8 +695,8 @@ private CharSequence generateFileHeader(final String namespaceName, final String
  sb.append("/* Generated SBE (Simple Binary Encoding) message codec */\n");
 
  sb.append(String.format(
- "#ifndef _%1$s_HPP_\n" +
- "#define _%1$s_HPP_\n\n" +
+ "#ifndef _%1$s_%2$s_HPP_\n" +
+ "#define _%1$s_%2$s_HPP_\n\n" +
  "#if defined(SBE_HAVE_CMATH)\n" +
  "/* cmath needed for std::numeric_limits<double>::quiet_NaN() */\n" +
  "# include <cmath>\n" +
@@ -709,6 +709,7 @@ private CharSequence generateFileHeader(final String namespaceName, final String
  "# define SBE_DOUBLE_NAN NAN\n" +
  "#endif\n\n" +
  "#include <sbe/sbe.hpp>\n\n",
+ namespaceName.toUpperCase(),
  className.toUpperCase()
  ));