Fix coercion of strings to bool.

Author: pmurias

src/vm/js/QAST/Compiler.nqp

@@ -2054,10 +2054,8 @@ class QAST::CompilerJS does DWIMYNameMangling does SerializeOnce {
             }
 
             if $desired == $T_BOOL {
-                if $got == $T_INT || $got == $T_NUM {
+                if $got == $T_INT || $got == $T_NUM || $got == $T_STR {
                     return Chunk.new($T_BOOL, $chunk.expr, [$chunk]);
-                } elsif $got == $T_STR {
-                    return $chunk;
                 }
             }