- fixed some compiler warnings

- video_x.cpp: now checks whether the X server has the XFree86DGA extension

BasiliskII/src/Unix/video_x.cpp

@@ -142,7 +142,7 @@ extern void SysMountFirstFloppy(void);
 // Set VideoMonitor according to video mode
 void set_video_monitor(int width, int height, int bytes_per_row, bool native_byte_order)
 {
-	int layout;
+	int layout = FLAYOUT_DIRECT;
 	switch (depth) {
 		case 1:
 			layout = FLAYOUT_DIRECT;
@@ -470,9 +470,13 @@ bool VideoInit(bool classic)
 
 #if ENABLE_DGA
 	// DGA available?
+	int event_base, error_base;
+	if (XF86DGAQueryExtension(x_display, &event_base, &error_base)) {
 		int dga_flags = 0;
 		XF86DGAQueryDirectVideo(x_display, screen, &dga_flags);
 		has_dga = dga_flags & XF86DGADirectPresent;
+	} else
+		has_dga = false;
 #endif
 
 	// Find black and white colors

BasiliskII/src/emul_op.cpp

@@ -152,9 +152,8 @@ void EmulOp(uint16 opcode, M68kRegisters *r)
 					}
 				} else if (reg < 0x08 && is_read) {
 					uint32 t = TimerDateTime();
-					uint8 b;
+					uint8 b = t;
 					switch (reg & 3) {
-						case 0: b = t; break;
 						case 1: b = t >> 8; break;
 						case 2: b = t >> 16; break;
 						case 3: b = t >> 24; break;

BasiliskII/src/macos_util.cpp

@@ -56,7 +56,7 @@ static bool is_drive_number_free(int num)
 	uint32 e = ReadMacInt32(0x308 + qHead);
 	while (e) {
 		uint32 d = e - dsQLink;
-		if (ReadMacInt16(d + dsQDrive) == num)
+		if ((int)ReadMacInt16(d + dsQDrive) == num)
 			return false;
 		e = ReadMacInt32(e + qLink);
 	}

BasiliskII/src/rom_patches.cpp

@@ -837,7 +837,6 @@ static bool patch_rom_classic(void)
 // ROM patches for 32-bit clean Mac-II ROMs (version $067c)
 static bool patch_rom_32(void)
 {
-	uint32 *lp;
 	uint16 *wp;
 	uint8 *bp;
 	uint32 base;

BasiliskII/src/slot_rom.cpp

@@ -392,7 +392,7 @@ bool InstallSlotROM(void)
 
 	// Calculate CRC
 	uint32 crc = 0;
-	for (int i=0; i<p; i++) {
+	for (uint32 i=0; i<p; i++) {
 		crc = (crc << 1) | (crc >> 31);
 		crc += srom[i];
 	}