Fixture C99 compliance on tricky macros for Spy & match core Unity version

 Add CFLAGS in Fixture Makefile to catch C99 rules with '-pedantic'

extras/fixture/test/Makefile

 CC = gcc
+CFLAGS += -Werror
+CFLAGS += -std=c99
+CFLAGS += -pedantic
+CFLAGS += -Wundef
 DEFINES = -D UNITY_OUTPUT_CHAR=UnityOutputCharSpy_OutputChar
 SRC = ../src/unity_fixture.c \
       ../../../src/unity.c   \
@@ -11,5 +15,5 @@ INC_DIR = -I../src -I../../../src/
 TARGET = fixture_tests.exe
 
 all:
-	@ $(CC) $(DEFINES) $(SRC) $(INC_DIR) -o $(TARGET)
-	@ ./$(TARGET)
+	$(CC) $(CFLAGS) $(DEFINES) $(SRC) $(INC_DIR) -o $(TARGET)
+	./$(TARGET)

extras/fixture/test/unity_fixture_Test.c

@@ -309,14 +309,17 @@ TEST_TEAR_DOWN(LeakDetection)
   }
 
 // This tricky set of defines lets us see if we are using the Spy, returns 1 if true, else 0
-#define USING_OUTPUT_SPY(a)                      EXPAND_AND_USE_2ND(ASSIGN_VALUE(a), 0)
+#define USING_SPY_AS(a)                          EXPAND_AND_USE_2ND(ASSIGN_VALUE(a), 0)
 #define ASSIGN_VALUE(a)                          VAL_FUNC_##a
 #define VAL_FUNC_UnityOutputCharSpy_OutputChar() 0, 1
-#define EXPAND_AND_USE_2ND(a, b)                 SECOND_PARAM(a, b)
+#define EXPAND_AND_USE_2ND(a, b)                 SECOND_PARAM(a, b, throwaway)
 #define SECOND_PARAM(a, b, ...)                  b
+#if USING_SPY_AS(UNITY_OUTPUT_CHAR())
+  #define USING_OUTPUT_SPY
+#endif
 TEST(LeakDetection, DetectsLeak)
 {
-#if USING_OUTPUT_SPY(UNITY_OUTPUT_CHAR()) == 0
+#ifndef USING_OUTPUT_SPY
     TEST_IGNORE_MESSAGE("Build with '-D UNITY_OUTPUT_CHAR=UnityOutputCharSpy_OutputChar' to enable tests");
 #else
     void* m = malloc(10);
@@ -333,7 +336,7 @@ TEST(LeakDetection, DetectsLeak)
 
 TEST(LeakDetection, BufferOverrunFoundDuringFree)
 {
-#if USING_OUTPUT_SPY(UNITY_OUTPUT_CHAR()) == 0
+#ifndef USING_OUTPUT_SPY
     UNITY_PRINT_EOL();
     TEST_IGNORE();
 #else
@@ -352,7 +355,7 @@ TEST(LeakDetection, BufferOverrunFoundDuringFree)
 
 TEST(LeakDetection, BufferOverrunFoundDuringRealloc)
 {
-#if USING_OUTPUT_SPY(UNITY_OUTPUT_CHAR()) == 0
+#ifndef USING_OUTPUT_SPY
     UNITY_PRINT_EOL();
     TEST_IGNORE();
 #else