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Remove unneeded variable in generate()

--- a/cc2/cgen.c

+++ b/cc2/cgen.c

@@ -411,7 +411,7 @@

 generate(void)

 {

 	extern char odebug;

-	uint8_t i, size = curfun->u.f.locals;

+	uint8_t size = curfun->u.f.locals;

 	char frame =  size != 0 || odebug;

 	if (frame) {

@@ -422,7 +422,7 @@

 			code(ADD, &regs[HL], &regs[SP]);

 			code(MOV, &regs[SP], &regs[HL]);

 		} else {

-			for (i = size; i != 0; i-= 2)

+			for (; size != 0; size-= 2)

 				code(PUSH, NULL, &regs[HL]);

 		}

 	}