embryo_cc - remove pointless test for null byte and space

space wins. the nul byte test is pointless. not a bug but pointless code

found by PVS studio

src/bin/embryo/embryo_cc_sc2.c

@@ -941,7 +941,7 @@ command(void)
 		error(8);	/* invalid/non-constant expression */
 	     fline = (int)val;
 
-	     while (*lptr == ' ' && *lptr != '\0')
+	     while (*lptr == ' ')
 	        lptr++;			/* skip whitespace */
 	     if (*lptr == '"')
                {