"Misc crash fixes"
https://github.com/mupen64plus/mupen64plus-core/pull/1080

Index: src/device/r4300/new_dynarec/arm/assem_arm.c
--- src/device/r4300/new_dynarec/arm/assem_arm.c.orig
+++ src/device/r4300/new_dynarec/arm/assem_arm.c
@@ -2040,6 +2040,7 @@ static void emit_writebyte_indexed_tlb(int rt, int add
 }
 static void emit_writeword(int rt, int addr)
 {
+  if(rt<0) return;
   u_int offset = addr-(u_int)&g_dev.r4300.new_dynarec_hot_state;
   assert(offset<4096);
   assem_debug("str %s,fp+%d",regname[rt],offset);
