Fix argument checks for math.deg()/math.rad().

src/lib_math.c

@@ -47,6 +47,12 @@ LJLIB_ASM_(math_tanh)		LJLIB_REC(math_htrig IRCALL_tanh)
 LJLIB_ASM_(math_frexp)
 LJLIB_ASM_(math_modf)		LJLIB_REC(.)
 
+LJLIB_PUSH(57.29577951308232)
+LJLIB_ASM_(math_deg)		LJLIB_REC(math_degrad)
+
+LJLIB_PUSH(0.017453292519943295)
+LJLIB_ASM_(math_rad)		LJLIB_REC(math_degrad)
+
 LJLIB_ASM(math_log)		LJLIB_REC(math_log)
 {
   double x = lj_lib_checknum(L, 1);
@@ -63,12 +69,6 @@ LJLIB_ASM(math_log)		LJLIB_REC(math_log)
   return FFH_RETRY;
 }
 
-LJLIB_PUSH(57.29577951308232)
-LJLIB_ASM_(math_deg)		LJLIB_REC(math_degrad)
-
-LJLIB_PUSH(0.017453292519943295)
-LJLIB_ASM_(math_rad)		LJLIB_REC(math_degrad)
-
 LJLIB_ASM(math_atan2)		LJLIB_REC(.)
 {
   lj_lib_checknum(L, 1);