Make struct jit_ctx more debugger friendly (#847)

Author: yuxiaomao

src/hlmodule.h

@@ -103,7 +103,7 @@ typedef struct {
 	bool large;
 } hl_debug_infos;
 
-typedef struct jit_ctx jit_ctx;
+typedef struct _jit_ctx jit_ctx;
 
 
 typedef struct {

src/jit.c

@@ -273,7 +273,7 @@ static const int RCPU_SCRATCH_REGS[] = { Eax, Ecx, Edx };
 static preg _unused = { RUNUSED, 0, 0, NULL };
 static preg *UNUSED = &_unused;
 
-struct jit_ctx {
+struct _jit_ctx {
 	union {
 		unsigned char *b;
 		unsigned int *w;