Fix seeking in SmallFS

Author: alvieboy

hardware/zpuino/zpu20/libraries/SmallFS/SmallFS.cpp

@@ -324,7 +324,7 @@ int SmallFSFile::readCallback(int s, void (*callback)(unsigned char, void*), voi
 	return save_s;
 }
 
-void SmallFSFile::seek(int pos, int whence)
+int SmallFSFile::seek(int pos, int whence)
 {
 	int newpos;
 
@@ -343,6 +343,8 @@ void SmallFSFile::seek(int pos, int whence)
 
 	seekpos=newpos;
 	SmallFS.seek(seekpos + flashoffset);
+
+        return newpos;
 }
 
 void SmallFS_class::loadSketch(const char *name)

hardware/zpuino/zpu20/libraries/SmallFS/SmallFS.h

@@ -64,7 +64,7 @@ class SmallFSFile
 	 * @param pos The required position
 	 * @param whence Where to perform seek. Either SEEK_SET, SEEK_CUR or SEEK_END
 	 */
-	void seek(int pos, int whence);
+	int seek(int pos, int whence);
 	/**
 	 * @brief Get the file size.
 	 * @return The file size.