bugfix: local buffer was not set to 0 at initialization

src/StreamBuffer.cc

@@ -46,7 +46,7 @@ init(const void* s, long minsize)
     else
     {
         // clear local buffer
-        memset(buffer+minsize, 0, cap-minsize);
+        memset(buffer, 0, cap);
     }
     if (s) {
         len = minsize;
@@ -54,6 +54,13 @@ init(const void* s, long minsize)
     }
 }
 
+// How the buffer looks like:
+// |----free-----|####used####|-------free-------|
+///|<--- offs -->|<-- len --->|<- cap-offs-len ->|
+// 0            offs      offs+len              cap
+//               |<-------------- minsize --------------->
+
+
 void StreamBuffer::
 grow(long minsize)
 {