Use tabs instead of spaces for indentation

This completes our switch to the Linux kernel coding style. Note that we
still use deeply nested constructs at some places which need to be fixed
up later.

Converted using the `Lindent` script from the Linux kernel code base,
along with some manual fixes.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/sha1.h

@@ -45,9 +45,9 @@
 #define SHA1_DIGESTLEN  20
 
 typedef struct {
-  uint32_t state[5];
-  uint32_t count[2];
-  uint8_t buffer[SHA1_BLOCKLEN];
+	uint32_t state[5];
+	uint32_t count[2];
+	uint8_t buffer[SHA1_BLOCKLEN];
 } sha1_ctx_t;
 
 void sha1_init(sha1_ctx_t *);