diff --git a/imageInput.c b/imageInput.c
index 8187d91..791a49b 100644
--- a/imageInput.c
+++ b/imageInput.c
@@ -7,7 +7,7 @@
 #define FILE_HEADER_STRING "__info2_image_file_format__"
 
 // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
-static void einzelBild(unsigned char *px_ls, FILE *file, GrayScaleImageSeries *series, unsigned short int breite, unsigned short int hoehe, unsigned char bildnummer){
+static void einzelBild(unsigned char *px_ls, FILE *file, GrayScaleImageSeries *series, unsigned short int breite, unsigned short int hoehe, unsigned int bildnummer){
     GrayScaleImage bild;
     bild.height = hoehe;
     bild.width = breite;
diff --git a/matrix.c b/matrix.c
index 60981b5..29bdc8f 100644
--- a/matrix.c
+++ b/matrix.c
@@ -93,7 +93,6 @@ Matrix multiply(const Matrix matrix1, const Matrix matrix2)
         output.rows = matrix1.rows;
         output.cols = matrix2.cols;
         output.buffer = malloc(sizeof(MatrixType)*output.rows*output.cols);
-        memset(output.buffer, 0 ,output.rows*output.cols);
         for (int spalte2=0;spalte2<output.cols;spalte2++){
             for (int zeile1=0;zeile1<matrix1.rows;zeile1++){
                 for (int zeile2=0;zeile2<matrix2.rows;zeile2++){