quicknes: clean up a few warnings

quicknes/fex/Data_Reader.cpp

@@ -232,7 +232,8 @@ static const BOOST::uint8_t val_tab[6]={0,0xC0,0xE0,0xF0,0xF8,0xFC};
 
 size_t utf8_char_len_from_header( char p_c )
 {
-	BOOST::uint8_t c = (BOOST::uint8_t)p_c;
+	// what is this?
+	// BOOST::uint8_t c = (BOOST::uint8_t)p_c;
 
 	size_t cnt = 0;
 	for(;;)

quicknes/mingw/Makefile

@@ -1,7 +1,7 @@
 CXX = g++
-CXXFLAGS = -Wall -DDISABLE_AUTO_FILE -D__LIBRETRO__ -I.. -Wno-multichar -O3 -fno-exceptions -fomit-frame-pointer
+CXXFLAGS = -Wall -DDISABLE_AUTO_FILE -D__LIBRETRO__ -DNDEBUG -I.. -O3 -Wno-multichar -fno-exceptions -fomit-frame-pointer
 TARGET = libquicknes.dll
-LDFLAGS = -shared -static-libgcc -static-libstdc++ 
+LDFLAGS = -shared -static-libgcc -static-libstdc++ $(CXXFLAGS)
 RM = rm
 CP = cp
 

quicknes/nes_emu/Nes_Core.cpp

@@ -213,7 +213,9 @@ void Nes_Core::enable_sram( bool b, bool read_only )
 
 // Unmapped memory
 
+#if !defined (NDEBUG) && 0
 static nes_addr_t last_unmapped_addr;
+#endif
 
 void Nes_Core::log_unmapped( nes_addr_t addr, int data )
 {

quicknes/nes_emu/blargg_endian.h

@@ -53,6 +53,7 @@
 
 inline void blargg_verify_byte_order()
 {
+#ifndef NDEBUG
 	#if BLARGG_BIG_ENDIAN
 		volatile int i = 1;
 		assert( *(volatile char*) &i == 0 );
@@ -60,6 +61,7 @@ inline void blargg_verify_byte_order()
 		volatile int i = 1;
 		assert( *(volatile char*) &i != 0 );
 	#endif
+#endif
 }
 
 inline unsigned get_le16( void const* p ) {