Fixed typo and includes in obiblob files

src/obiblob.c

@@ -13,7 +13,10 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>
+#include <math.h>
 
+#include "obiblob.h"
+#include "encode.h"
 #include "obierrno.h"
 #include "obitypes.h"	// For byte_t type
 #include "obidebug.h"

src/obiblob.h

@@ -1,5 +1,5 @@
 /****************************************************************************
- * Encoding header file	                                                    *
+ * Obiblob header file	                                                    *
  ****************************************************************************/
 
 /**