*.[ch]: remove extern from function declarations using spatch

There has been a push to remove extern from function declarations.
Remove some instances of "extern" for function declarations which are
caught by Coccinelle. Note that Coccinelle has some difficulty with
processing functions with `__attribute__` or varargs so some `extern`
declarations are left behind to be dealt with in a future patch.

This was the Coccinelle patch used:

	@@
	type T;
	identifier f;
	@@
	- extern
	  T f(...);

and it was run with:

	$ git ls-files \*.{c,h} |
		grep -v ^compat/ |
		xargs spatch --sp-file contrib/coccinelle/noextern.cocci --in-place

Files under `compat/` are intentionally excluded as some are directly
copied from external sources and we should avoid churning them as much
as possible.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ppc/sha1.c b/ppc/sha1.c
index ec6a192..b5d8af4 100644
--- a/ppc/sha1.c
+++ b/ppc/sha1.c
@@ -10,7 +10,7 @@
 #include <string.h>
 #include "sha1.h"
 
-extern void ppc_sha1_core(uint32_t *hash, const unsigned char *p,
+void ppc_sha1_core(uint32_t *hash, const unsigned char *p,
 			  unsigned int nblocks);
 
 int ppc_SHA1_Init(ppc_SHA_CTX *c)