Update documentation and do some basic housekeeping

src/common/memory.c

@@ -62,19 +62,19 @@ void MEM_Write(mem_block_t *in)
 	WriteBlock(head, in);
 }
 
-int MEM_Read(mem_block_t *out)
+bool MEM_Read(mem_block_t *out)
 {
 	int head;
 
 	head = GetUsedBlock();
 
 	if (head < 0) { // Empty?
-		return -1;
+		return false;
 	}
 
 	ReadBlock(head, out);
 
-	return 0;
+	return true;
 }
 
 void MEM_Free(void)

src/common/memory.h

@@ -1,6 +1,8 @@
 #ifndef MAD_CORE_COMMON_MEMORY_H
 #define MAD_CORE_COMMON_MEMORY_H
 
+#include "common/types.h"
+
 typedef struct mem_block_s mem_block_t;
 
 // Important: Must reset EEPROM memory when the size of
@@ -13,7 +15,7 @@ struct mem_block_s {
 } __attribute__((packed));
 
 void  MEM_Write(mem_block_t *in);
-int   MEM_Read(mem_block_t *out);
+bool  MEM_Read(mem_block_t *out);
 void  MEM_Free(void);
 void  MEM_Dump(void);