hashx: Fix a few more compiler warnings

Fix a couple cases where size_t values were being confused with int.

Signed-off-by: Micah Elizabeth Scott <beth@torproject.org>

src/ext/equix/hashx/src/compiler_a64.c

@@ -55,7 +55,7 @@ bool hashx_compile_a64(const hashx_program* program, uint8_t* code) {
 	uint8_t* target = NULL;
 	int creg = -1;
 	EMIT(pos, a64_prologue);
-	for (int i = 0; i < program->code_size; ++i) {
+	for (size_t i = 0; i < program->code_size; ++i) {
 		const instruction* instr = &program->code[i];
 		switch (instr->opcode)
 		{

src/ext/equix/hashx/src/program.c

@@ -678,7 +678,7 @@ bool hashx_program_generate(const siphash_state* key, hashx_program* program) {
 
 	/* Calculate ASIC latency:
 	   Assumes 1 cycle latency for all operations and unlimited parallelization. */
-	for (int i = 0; i < program->code_size; ++i) {
+	for (size_t i = 0; i < program->code_size; ++i) {
 		instruction* instr = &program->code[i];
 		if (instr->dst < 0)
 			continue;
@@ -724,8 +724,8 @@ bool hashx_program_generate(const siphash_state* key, hashx_program* program) {
 static const char* x86_reg_map[] = { "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
 
 void hashx_program_asm_x86(const hashx_program* program) {
-	int target = 0;
-	for (unsigned i = 0; i < program->code_size; ++i) {
+	size_t target = 0;
+	for (size_t i = 0; i < program->code_size; ++i) {
 		const instruction* instr = &program->code[i];
 		switch (instr->opcode)
 		{
@@ -762,13 +762,13 @@ void hashx_program_asm_x86(const hashx_program* program) {
 			break;
 		case INSTR_TARGET:
 			printf("test edi, edi\n");
-			printf("target_%i: cmovz esi, edi\n", i);
+			printf("target_%i: cmovz esi, edi\n", (int)i);
 			target = i;
 			break;
 		case INSTR_BRANCH:
 			printf("or edx, esi\n");
 			printf("test edx, %i\n", instr->imm32);
-			printf("jz target_%i\n", target);
+			printf("jz target_%i\n", (int)target);
 			break;
 		default:
 			UNREACHABLE;