fbc: remove extra parentheses in gcc emitter

- eliminate warnings for -Wparentheses-equality due to changes in conditional 'if' expressions
- noted to cause a warning in fbc/emscripten compilations
- due to commit #94db491bd54a87293b5c56716a10fcd8ab53fc40
- change in ir-hlc.bas now emits logical not operator '(!(expr))'
- however the extra parenthesis were emitted when logic is not inverted '((expr))'

src/compiler/ir-hlc.bas

@@ -2885,11 +2885,13 @@ private sub _emitBop _
 		static as string s
 		s = "if( "
 		if( (options and IR_EMITOPT_REL_DOINVERSE) <> 0 ) then
-			s += "!"
+			s += "!("
 		end if
-		s += "("
 		s += exprFlush( exprNewBOP( op, l, r ) )
-		s += ") ) goto "
+		if( (options and IR_EMITOPT_REL_DOINVERSE) <> 0 ) then
+			s += ")"
+		end if
+		s += ") goto "
 		s += *symbGetMangledName( label )
 		s += ";"
 		hWriteLine( s )