Util: Fix Parser number error detection

src/util/json/parser.cpp

@@ -211,6 +211,7 @@ Value Parser::getNumber()
 		}
 	}
 
+	if (fractionPosition != 0 || exponentPosition != 0) {
 		if (fractionPosition == exponentPosition - 1) {
 			reportError(token, "invalid exponent sign, expected number");
 			return nullptr;
@@ -220,6 +221,7 @@ Value Parser::getNumber()
 			reportError(token, "invalid number");
 			return nullptr;
 		}
+	}
 
 	return std::stod(token.symbol);
 }