A missing return value and a missing initialisation

src/pattern_sim.c

@@ -201,4 +201,6 @@ int main(int argc, char *argv[])
 		if ( n_images && (number >= n_images) ) done = 1;
 
 	} while ( !done );
+
+	return 0;
 }

src/utils.c

@@ -77,7 +77,7 @@ void progress_bar(int val, int total, const char *text)
 double poisson_noise(double expected)
 {
 	double L;
-	int k;
+	int k = 0;
 	double p = 1.0;
 
 	L = exp(-expected);