Change the return type of `git_blob_rawcontent`

Should return `void *` for raw bytes.

Signed-off-by: Vicent Marti <tanoku@gmail.com>

include/git2/blob.h

@@ -102,7 +102,7 @@ GIT_EXTERN(int) git_blob_set_rawcontent(git_blob *blob, const void *buffer, size
  * @param blob pointer to the blob
  * @return the pointer; NULL if the blob has no contents
  */
-GIT_EXTERN(const char *) git_blob_rawcontent(git_blob *blob);
+GIT_EXTERN(const void *) git_blob_rawcontent(git_blob *blob);
 
 /**
  * Get the size in bytes of the contents of a blob

src/blob.c

@@ -30,7 +30,7 @@
 #include "common.h"
 #include "blob.h"
 
-const char *git_blob_rawcontent(git_blob *blob)
+const void *git_blob_rawcontent(git_blob *blob)
 {
 	assert(blob);