Correct the spelling of the FLEX_ARRAY macro

When setting the default value, the macro name was specified
as GIT_FLEX_ARRAY, which is inconsistent with it's earlier
usage in the file. This caused a compilation error, using the
MS Visual C/C++ compiler, when compiling the git_packlist
struct definition in src/odb.c.

In addition to changing the spelling of the FLEX_ARRAY macro
to GIT_FLEX_ARRAY, including it's use in src/odb.c, we also
rename the TYPEOF macro to GIT_TYPEOF.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>

src/cc-compat.h

@@ -7,14 +7,14 @@
 /*
  * See if our compiler is known to support flexible array members.
  */
-#ifndef FLEX_ARRAY
+#ifndef GIT_FLEX_ARRAY
 # if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
-#  define FLEX_ARRAY /* empty */
+#  define GIT_FLEX_ARRAY /* empty */
 # elif defined(__GNUC__)
 #  if (__GNUC__ >= 3)
-#   define FLEX_ARRAY /* empty */
+#   define GIT_FLEX_ARRAY /* empty */
 #  else
-#   define FLEX_ARRAY 0 /* older GNU extension */
+#   define GIT_FLEX_ARRAY 0 /* older GNU extension */
 #  endif
 # endif
 
@@ -25,9 +25,9 @@
 #endif
 
 #ifdef __GNUC__
-# define TYPEOF(x) (__typeof__(x))
+# define GIT_TYPEOF(x) (__typeof__(x))
 #else
-# define TYPEOF(x)
+# define GIT_TYPEOF(x)
 #endif
 
 #endif /* INCLUDE_compat_h__ */

src/odb.c

@@ -70,7 +70,7 @@ typedef struct git_pack git_pack;
 typedef struct {
 	size_t n_packs;
 	unsigned int refcnt;
-	git_pack *packs[FLEX_ARRAY];
+	git_pack *packs[GIT_FLEX_ARRAY];
 } git_packlist;
 
 struct git_odb {