Changed the behaviour if trying to realloc a memory chunk of size 0 to

be consistent across systems (an error would be generated on Ubuntu when
no primers found)

src/libecoPCR/ecoMalloc.c

@@ -54,8 +54,14 @@ void   *eco_realloc(void *chunk,
 {
 	void *newchunk;
 
-	newchunk = realloc(chunk,newsize);
+	if (newsize == 0)
+	{
+		if (chunk)
+			free(chunk);
+		return NULL;
+	}
 
+	newchunk = realloc(chunk,newsize);
 
 	if (!newchunk)
            {