[C/C++] Fix implicit conversion of integers to booleans.

Author: denizevrenci

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/c/CGenerator.java

@@ -910,7 +910,7 @@ private CharSequence generateChoices(final String bitsetStructName, final List<T
  sb.append(String.format("\n" +
  "SBE_ONE_DEF bool %1$s_check_%2$s_bit(const %3$s bits)\n" +
  "{\n" +
- " return bits & ((%3$s)1 << %4$s);\n" +
+ " return (bits & ((%3$s)1 << %4$s)) != 0;\n" +
  "}\n",
  bitsetStructName,
  choiceName,
@@ -934,7 +934,7 @@ private CharSequence generateChoices(final String bitsetStructName, final List<T
  "%3$s" +
  " %5$s val;\n" +
  " memcpy(&val, codec->buffer + codec->offset, sizeof(%5$s));\n" +
- " return %4$s(val) & ((%5$s)1 << %6$s);\n" +
+ " return (%4$s(val) & ((%5$s)1 << %6$s)) != 0;\n" +
  "}\n",
  bitsetStructName,
  choiceName,

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java

@@ -736,7 +736,7 @@ private CharSequence generateChoices(final String bitsetClassName, final List<To
  sb.append(String.format("\n" +
  " static bool %1$s(const %2$s bits)\n" +
  " {\n" +
- " return bits & (static_cast<%2$s>(1) << %3$s);\n" +
+ " return (bits & (static_cast<%2$s>(1) << %3$s)) != 0;\n" +
  " }\n",
  choiceName,
  typeName,
@@ -758,7 +758,7 @@ private CharSequence generateChoices(final String bitsetClassName, final List<To
  "%2$s" +
  " %4$s val;\n" +
  " std::memcpy(&val, m_buffer + m_offset, sizeof(%4$s));\n" +
- " return %3$s(val) & (static_cast<%4$s>(1) << %5$s);\n" +
+ " return (%3$s(val) & (static_cast<%4$s>(1) << %5$s)) != 0;\n" +
  " }\n",
  choiceName,
  generateChoiceNotPresentCondition(token.version(), BASE_INDENT),