-Fixed a number of warnings

desmume/src/NDSSystem.c

@@ -71,6 +71,7 @@ int NDS_Init(void) {
      MMU_writeWord(0, 0x000000C, 0xE1B02040);
      MMU_writeWord(0, 0x0000010, 0xE3B02020);
 //     MMU_writeWord(0, 0x0000010, 0xE2100202);
+     return 0;
 }
 
 void NDS_DeInit(void) {

desmume/src/cflash.c

@@ -608,6 +608,7 @@ unsigned int cflash_read(unsigned int address) {
 		s = cf_reg_lba1;
 		return s; 
 	}
+        return 0;
 }
 
 

desmume/src/saves.c

@@ -213,6 +213,8 @@ int savestate_load (const char *file_name)    {
         gzclose (file);
 
 	return 1;
+#else
+        return 0;
 #endif
 }
 
@@ -326,6 +328,8 @@ int savestate_save (const char *file_name)    {
         gzclose (file);
 
 	return 1;
+#else
+        return 0;
 #endif
 }