Some minor fixes.

brightness.cpp

@@ -107,7 +107,7 @@ static int spi_open(int speed, int mode)
 	return -1;
 }
 
-static int spi_close()
+static void spi_close()
 {
 	if(spiFd >= 0) close(spiFd);
 	spiFd = -1;

input.cpp

@@ -2198,6 +2198,8 @@ int input_poll(int getchar)
 			user_io_digital_joystick(i, af[i] ? joy[i] & ~autofire[i] : joy[i], newdir);
 		}
 	}
+
+	return 0;
 }
 
 int is_key_pressed(int key)

st_tos.cpp

@@ -1126,9 +1126,9 @@ void tos_config_init(void)
 {
 	// set default values
 	config.system_ctrl = TOS_MEMCONFIG_4M | TOS_CONTROL_BLITTER;
-	memcpy(config.tos_img, "TOS.IMG", 12);
+	strcpy(config.tos_img, "TOS.IMG");
 	config.cart_img[0] = 0;
-	memcpy(config.acsi_img[0], "HARDDISK.HD", 12);
+	strcpy(config.acsi_img[0], "HARDDISK.HD");
 	config.acsi_img[1][0] = 0;
 	config.video_adjust[0] = config.video_adjust[1] = 0;
 

user_io.cpp

@@ -2121,6 +2121,9 @@ static int findPLLpar(double Fout, uint32_t *pc, uint32_t *pm, double *pko)
 			return 1;
 		}
 	}
+
+	//will never reach here
+	return 0;
 }
 
 static void setPLL(double Fout)
@@ -2173,7 +2176,7 @@ static void setPLL(double Fout)
 	vitems[20] = k;
 }
 
-static int setVideo()
+static void setVideo()
 {
 	printf("Send HDMI parameters:\n");
 	spi_uio_cmd_cont(UIO_SET_VIDEO);